| Parent | Children | Sport(s) | Country of origin |
| Cor van Aanholt | Philipine van Aanholt, Odile van Aanholt | Sailing |  Netherlands Antilles ( Curaçao)
 Aruba
 Netherlands |
| Mary Abbott | Margaret Abbott | Golf |  United States |
| | Hifumi Abe, Uta Abe | Judo |  Japan |
| | Valerie Adams, Steven Adams | Shot put / Basketball |  New Zealand |
| Cláudio Adão | Felipe Adão | Association football |  Brazil |
| | Marija Agbaba, Jelena Agbaba | Handball |  Serbia |
| Óscar Aguirregaray | Matías Aguirregaray | Association football |  Uruguay |
| Ahn Jae-hyung, Jiao Zhimin | An Byeong-hun | Table tennis, Golf |  South Korea |
| | Veronika Aigner, Barbara Aigner, Johannes Aigner | Para-alpine skiing |  Austria |
| | Julian Alaphilippe, Bryan Alaphilippe | Cycle sport |  France |
| Louie Alas | Kevin Alas, Junjun Alas | Basketball |  Philippines |
| Nigel Albon | Alexander Albon | Auto racing |  United Kingdom ( England)
 Thailand |
| Virgilijus Alekna | Mykolas Alekna | Discus throw |  Lithuania |
| Svetlana Alekseeva | Elena Kustarova | Figure skating |  Russia |
| | Anna-Maria Alexandri, Eirini-Marina Alexandri, Vasiliki Alexandri (triplets) | Synchronised swimming | Austria |
| | Muhammad Ali, Rahaman Ali | Boxing | United States |
| Muhammad Ali | Laila Ali | Boxing | United States |
| Joe Allen (great-grandfather) Bobby Allen (grandfather) | Jacob Allen (father) Logan Schuchart. (grandfather) | Auto racing | United States |
| Bobby Allison | Davey Allison, Clifford Allison | Stock car racing | United States |
| Jen Allred | Shayna Powless, Neilson Powless | Long-distance running
Cycle sport | United States |
| Periko Alonso | Xabi Alonso, Mikel Alonso | Association football |  Spain |
| Luc Alphand | Estelle Alphand | Alpine skiing | France
 Sweden |
| | Hamit Altıntop, Halil Altıntop | Association football |  Turkey |
| | Pedro Amat Fontanals (in Spanish), Jaime Amat Fontanals (in Spanish), Francisco Amat Fontanals (in Spanish), Juan Amat Fontanals (in Spanish) | Field hockey | Spain |
| Jaime Amat Fontanals (in Spanish) | Santi Amat, Santi Freixa (cousin) | Field hockey | Spain |
| Francisco Amat Fontanals (in Spanish) | Pol Amat, Santi Freixa (cousin) | Field hockey | Spain |
| | Al-Farouq Aminu, Alade Aminu | Basketball |  Nigeria
United States |
| Lala Amarnath | Mohinder Amarnath, Surinder Amarnath, Rajinder Amarnath | Cricket |  India |
| | Anand Amritraj, Vijay Amritraj | Tennis | India |
| Anand Amritraj | Stephen Amritraj | Tennis | India
United States |
| Vijay Amritraj | Prakash Amritraj | Tennis | India |
| Kwame Ampadu | Ethan Ampadu | Association football |  Ireland
United Kingdom ( Wales) |
| | Ivica Ančić, Mario Ančić, Sanja Ančić | Tennis |  Croatia |
| | Asbjørn Kragh Andersen, Søren Kragh Andersen | Cycle sport |  Denmark |
| Dennis Anderson | Adam Anderson, Ryan Anderson, Krysten Anderson | Monster truck | United States |
| Roy Andersson | Patrik Andersson, Daniel Andersson | Association football | Sweden |
| Andretti family | | Auto racing |  Italy
United States |
| Jesús Angoy | Jesjua Angoy-Cruyff | Association football / American football | Spain |
| Vyacheslav Anisin Irina Cherniaeva | Marina Anissina, Mikhail Anisin | Ice hockey / Figure skating | Russia |
| Anoaʻi family | | Professional wrestling |  American Samoa
 Samoa
United States
 Canada |
| | Faisal Antar, Roda Antar | Association football |  Lebanon |
| | Giannis Antetokounmpo, Thanasis Antetokounmpo, Kostas Antetokounmpo | Basketball |  Greece |
| Aiva Aparjode | Kristers Aparjods, Kendija Aparjode | Luge |  Latvia |
| Marlou Aquino | Matthew Aquino | Basketball | Philippines / Japan |
| Franjo Arapović | Marko Arapović | Basketball | Croatia |
| Hasson Arbubakrr | Hassan Whiteside | American football / Basketball | United States |
| | Joaquín Arcega, José Arcega, Fernando Arcega | Basketball | Spain |
| Joaquín Arcega | J. J. Arcega-Whiteside | Basketball, American football | Spain |
| | John Archibald, Katie Archibald | Cycle sport | United Kingdom ( Scotland) |
| | Mai Asada, Mao Asada | Figure skating | Japan |
| Antonio Ascari | Alberto Ascari | Motorsport | Italy |
| Lisa Ashton | Danielle Ashton | Darts | United Kingdom ( England) |
| | Dan Atherton, Gee Atherton, Rachel Atherton | Cycle sport, Downhill mountain biking | United Kingdom ( England) |
| Pierre Aubameyang | Catilina Aubameyang, Willy Aubameyang, Pierre-Emerick Aubameyang | Association football |  Gabon
France |
| Ronald Van Avermaet | Greg Van Avermaet | Road bicycle racing |  Belgium |
| Albert Azaryan | Eduard Azaryan | Gymnastics |  Soviet Union ( Armenian SSR)
 Armenia |
| Abedi Pele | André Ayew, Jordan Ayew, Ibrahim Ayew | Association football |  Ghana |
Magnus Bäckstedt
Megan Hughes | Elynor Bäckstedt, Zoe Bäckstedt | Cycle sport | Sweden
United Kingdom ( Wales) |
| Gustavo Badell | Yamila Badell | Association football | Uruguay |
| Jean-Claude Bagot | Yoann Bagot | Cycle sport | France |
| David Bairstow | Jonny Bairstow | Cricket | United Kingdom ( England) |
| John Baldwin Sr. | John Baldwin, Don Baldwin, Donna Baldwin | Figure skating | United States |
| | Mosab Balhous, Anas Balhous | Association football |  Syria |
| | Lonzo, LiAngelo, and LaMelo Ball | Basketball |  United States |
| Sergei Baltacha | Sergei Baltacha Jr., Elena Baltacha | Association football
Tennis | Soviet Union ( Ukrainian SSR)
United Kingdom |
| Rubens Barrichello | Eduardo Barrichello | Motorsport | Brazil |
| Billy Bates | William Bates | Cricket/Association football | United Kingdom ( England)
United Kingdom ( Wales) |
| William Bates | Ted Bates | Cricket/Association football | United Kingdom ( Wales)
United Kingdom ( England) |
| | Guin Batten, Miriam Batten | Rowing | United Kingdom ( England) |
| | Rudy Barbier, Pierre Barbier | Cycle sport | France |
| | Franco Baresi, Giuseppe Baresi | Association football | Italy |
| Giuseppe Baresi | Regina Baresi | Association football | Italy |
| | Hannah Barnes, Alice Barnes | Cycle sport | United Kingdom ( England) |
| Sid Barras | Tom Barras | Cycle sport | United Kingdom ( England) |
| | Mutaz Essa Barshim, Muamer Aissa Barsham, Meshaal Barsham | Track and field, Association football |  Qatar |
| | Kane Barrett, Beauden Barrett, Scott Barrett, Jordie Barrett | Rugby union | New Zealand |
| Rick Barry | Scooter, Jon, Brent and Drew Barry | Basketball | United States |
| | Sally Barsosio, Florence Barsosio | Track and field |  Kenya |
| Karel Bártů | Jan Bártů | Modern pentathlon |  Czechoslovakia |
| | Bates Battaglia, Anthony Battaglia | Ice hockey | United States |
| Alex Baumann | Ashton Baumann | Swimming | Canada |
| | Alain Baxter, Noel Baxter | Alpine skiing | Great Britain ( Scotland) |
| | Ryan Bayley, Kristine Bayley | Track cycling |  Australia |
| John Beattie | Johnnie Beattie | Rugby union | United Kingdom ( Scotland) |
| | Bridget Becker, Scott Becker, Sean Becker | Curling | New Zealand |
| Benoni Beheyt (grandfather) | Kurt Van Keirsbulck (father) | Road bicycle racing | Belgium |
| Kurt Van Keirsbulck (father) | Guillaume Van Keirsbulck (grandson) | Road bicycle racing | Belgium |
| Derek Bell | Justin Bell | Motor sport | United Kingdom |
| | Martin Bell, Graham Bell | Alpine skiing | United Kingdom |
| | Chantal Beltman, Ghita Beltman | Road bicycle racing | Netherlands |
| | Lars Bender, Sven Bender | Association football |  Germany |
| Winston Benjamin | Rai Benjamin | Cricket
Track and field |  West Indies
United States |
| Nigel Benn | Conor Benn | Boxing | United Kingdom ( England) |
| | Takumi Beppu, Fumiyuki Beppu | Road bicycle racing | Japan |
| | Aleksei Berezutski, Vasili Berezutski | Association football | Russia |
| Arturo Bergamasco | Mauro Bergamasco, Mirco Bergamasco | Rugby union | Italy |
| | Lars Berger, Tora Berger | Biathlon, cross-country skiing |  Norway |
| Jean-François Bernard | Julien Bernard | Road bicycle racing | France |
| Jean-René Bernaudeau | Giovanni Bernaudeau | Road bicycle racing | France |
| | Raimund Bethge, Bernhard Hochwald | Bobsleigh, shooting |  East Germany
Germany |
| | Emmanuel Bett, Josphat Bett Kipkoech, David Kiprotich Bett[1] | Running | Kenya |
| Jim Bett | Baldur Bett, Calum Bett | Association football | United Kingdom ( Scotland)
 Iceland |
| | Nicholas Bett, Aron Koech (twins) | Track and field | Kenya |
| Tony Bettenhausen | Gary Bettenhausen, Merle Bettenhausen, Tony Bettenhausen Jr. | Auto racing | United States |
| Volodymyr Bezsonov Viktoria Serkyh | Anna Bessonova | Association football / Rhythmic gymnastics | Soviet Union ( Ukrainian SSR)
 Ukraine |
| | Henry Bibby, Jim Bibby | Basketball / Baseball | United States |
| Henry Bibby | Mike Bibby | Basketball | United States |
| | Brad Binder, Darryn Binder | Motorcycle racing |  South Africa |
| | Ben and Tom Birchall | Sidecar racing | United Kingdom ( England) |
| | Dag Bjørndalen, Ole Einar Bjørndalen | Biathlon, cross-country skiing | Norway |
| Jo Inge Bjørnebye | Stig Inge Bjørnebye | Ski jumping / Association football | Norway |
| | Sadie Bjornsen, Erik Bjornsen | Cross-country skiing | United States |
| Norman Black | Aaron Black (son), Chris Tan (stepson) | Basketball | United States
Philippines |
| | Danny Blanchflower. Jackie Blanchflower | Association football | United Kingdom ( Northern Ireland) |
| Lou Blaney (grandfather) | Dave Blaney (father), Dale Blaney (uncle) | Stock car racing / All Star Circuit of Champions | United States |
| Dave Blaney (father) | Ryan Blaney (grandson) | Stock car racing | United States |
| David Blatt | Tamir Blatt | Basketball | United States
 Israel |
| Michael Bleekemolen | Sebastiaan Bleekemolen, Jeroen Bleekemolen | Motor sport | Netherlands |
| Danny Blind | Daley Blind | Association football | Netherlands |
| Stig Blomqvist | Tom Blomqvist | Rallying / Motor racing | Sweden
United Kingdom |
| | Kevin-Prince Boateng, Jérôme Boateng | Association football | Ghana
Germany |
| | Tarjei Bø, Johannes Thingnes Bø | Biathlon | Norway |
| | Łukasz Bodnar, Maciej Bodnar | Road bicycle racing |  Poland |
| | Frank de Boer, Ronald de Boer | Association football | Netherlands |
| | Håvard Bøkko, Hege Bøkko | Speed skating | Norway |
| | Valeria Bondarenko, Alona Bondarenko, Kateryna Bondarenko | Tennis | Ukraine |
| Bobby Bonds | Barry Bonds | Baseball | United States |
| Ray Boone | Bob Boone | Baseball | United States |
| Bob Boone | Bret Boone, Aaron Boone | Baseball | United States |
| Ferdinando Longo Borghini, Guidina Dal Sasso | Paolo Longo Borghini, Elisa Longo Borghini | Cross-country skiing
Cycle sport | Italy |
| Jacques Borlée | Dylan Borlée, Kevin Borlée, Jonathan Borlée, Olivia Borlée | Track and field | Belgium |
| | Dajana Bošković, Tijana Bošković | Volleyball |  Bosnia and Herzegovina
Serbia |
| Patrick Bourdais | Sébastien Bourdais | Auto racing | France |
| | Jan Bos, Theo Bos | Speed skating and Road bicycle racing | Netherlands |
| | Mouhanad Boushi, Nihad Al Boushi | Association football | Syria |
| Ian Botham | Liam Botham | Cricket, association football, rugby union, rugby league | United Kingdom ( England) |
| | Nacer Bouhanni, Rayane Bouhanni | Cycle sport | France) |
| Jacky Boxberger | Ophélie Claude-Boxberger | Track and field | France |
| | Gillian Boxx, Shannon Boxx | Softball / Association football | United States |
Ray Boyd
Denise Robert Boyd | Alana Boyd | Track and field | Australia |
| | Cloyd Boyer, Ken Boyer, Clete Boyer | Baseball | United States |
| Jack Brabham | Geoff Brabham, Gary Brabham, David Brabham | Motor racing | Australia |
| Geoff Brabham | Matthew Brabham | Motor racing | Australia
United States |
| David Brabham, Lisa Thackwell | Sam Brabham | Motor racing | Australia
New Zealand
United Kingdom |
| | Bob Bradley, Scott Bradley | Association football / Baseball | United States |
| Bob Bradley | Michael Bradley | Association football | United States |
| Abel Braga | Fábio Braga | Association football | Brazil
 Portugal |
| Lisa Brambani | Abby-Mae Parkinson | Cycle sport | United Kingdom ( England) |
| | Gjermund Bråten, Øystein Bråten | Snowboarding / Freestyle skiing | Norway |
| Harald Brattbakk | Filip Brattbakk | Association football | Norway |
| | Ben Bright, Rowena Bright, Torah Bright | Snowboarding / Alpine skiing | Australia |
Robbie Brightwell
Ann Packer | Ian Brightwell, David Brightwell | Track and field / Association football | United Kingdom ( England) |
| Chris Broad | Stuart Broad | Cricket | United Kingdom ( England) |
| Stuart Brown | Jake Brown | Sidecarcross | United Kingdom ( England) |
| | Alistair Brownlee, Jonny Brownlee | Triathlon | United Kingdom ( England) |
| Mark Brownlee | Scott Brownlee | Rowing | New Zealand |
| Steve Bruce | Alex Bruce | Association football | United Kingdom ( England)
United Kingdom ( Northern Ireland)
Ireland |
| Martin Brundle | Alex Brundle | Auto racing | United Kingdom ( England) |
| | Martin Brundle, Robin Brundle | Auto racing | United Kingdom ( England) |
| | Bryan brothers | Tennis | United States |
| Joe Bryant | Kobe Bryant | Basketball | United States |
| Sergey Bubka | Sergei Bubka | Track and field / Tennis | Soviet Union ( Ukrainian SSR)
Ukraine |
| Jiří Bubla | Jiří Šlégr | Ice hockey | Czech Republic |
| | Nicholas Buckland, Joseph Buckland | Figure skating | United Kingdom ( England) |
| Andrei Bukin, Elena Vasiuk | Ivan Bukin | Ice dancing | Russia |
| Alex Bunbury | Teal Bunbury | Association football | Canada
United States |
| Vladimir Bure | Pavel Bure, Valeri Bure | Swimming
Ice hockey | Soviet Union ( Russian SFSR)
Russia
United States |
| Burge family | | Rugby union
Rugby league | Australia |
| | Ilya Burov, Maxim Burov | Freestyle skiing | Russia |
| | Leroy Burrell, Dawn Burrell | Track and field | United States |
| Leroy Burrell, Michelle Finn-Burrell | Cameron Burrell, Joshua Burrell | Track and field | United States |
| Beryl Burton | Denise Burton | Cycle sport | Great Britain ( England) |
| Jeff Burton | Harrison Burton | Stock car racing | United States |
| Maurice Burton | Germain Burton | Cycle sport | Great Britain ( England) |
| Ward Burton | Jeb Burton | Stock car racing | United States |
| Jorge Burruchaga | Mauro Burruchaga, Román Burruchaga | Association football, Tennis |  Argentina |
| | Kamil Bury, Dominik Bury | Cross-country skiing | Poland |
| Tom Busch | Kurt Busch, Kyle Busch | Stock car racing | United States |
| Carles Busquets | Sergio Busquets | Association football | Spain |
| | Vyacheslav Butsayev, Yuri Butsayev | Ice hockey | Russia |
| John Button | Jenson Button | Rallycross / Auto racing | United Kingdom ( England) |
| Franky De Buyst (in Dutch) | Jasper De Buyst | Cycle sport | Belgium |
| Sonny Cabatu | Junjun Cabatu | Basketball | Philippines |
| John H. Caldwell | Tim Caldwell, Sophie Caldwell | Cross-country skiing | United States |
| | Cate Campbell, Bronte Campbell | Swimming | Australia |
| | Fabio Cannavaro, Paolo Cannavaro | Association football | Italy |
| | Isabella Cannuscio, Anastasia Cannuscio | Ice dancing | United States |
| | Eric Cantona, Joel Cantona | Association football | France |
| | Peter Carruthers, Kitty Carruthers | Figure skating | United States |
| | Mauro Caviezel, Gino Caviezel | Alpine skiing |  Switzerland |
| Cha Bum-kun | Cha Du-ri | Association football | South Korea
Germany |
| Giorgio Cagnotto, Carmen Casteiner | Tania Cagnotto | Diving | Italy |
| Daniela Ceccarelli | Lara Colturi | Alpine skiing | Italy
 Albania |
| Johnny Cecotto | Johnny Cecotto Jr. | Auto racing |  Venezuela |
| | Francisco Cerúndolo, Constanza Cerundolo, Juan Manuel Cerúndolo | Tennis
Field Hockey | Argentina |
| Richard Coffey | Amir Coffey, Nia Coffey | Basketball | United States |
| Ray Chadwick | Sydney Leroux | Baseball
Association football | United States
Canada |
| | Richard Chambers, Peter Chambers | Rowing | United Kingdom ( Northern Ireland) |
| Gurwinder Singh Chandi | Manjeet Kaur | Field hockey / Athletics | India |
| Vicky Chandhok | Karun Chandhok | Motorsport | India |
| | Ian Chappell, Greg Chappell, Trevor Chappell | Cricket | Australia |
| | John Charles, Mel Charles | Association football | United Kingdom ( Wales) |
| Mel Charles | Jeremy Charles | Association football | United Kingdom ( Wales) |
| Ruperta Charles | Kaila Charles, Afia Charles | Athletics / Basketball / Athletics |  Antigua and Barbuda / United States / Antigua and Barbuda |
| | Sylvain Chavanel, Sébastien Chavanel | Road bicycle racing | France |
| | Eddie Cheever, Ross Cheever | Auto sport | United States |
| Eddie Cheever | Eddie Cheever III | Auto sport | United States
Italy |
| | Mercy Cherono, Caroline Chepkoech Kipkirui | Long-distance running | Kenya |
| Dmitri Cheryshev | Denis Cheryshev | Association football |  CIS
Russia |
| Peter Chiarelli | Talia Chiarelli | Ice hockey / Gymnastics | Canada |
| Enrico Chiesa | Federico Chiesa | Association football | Italy |
| | Tom Chilton, Max Chilton | Motorsport | United Kingdom |
| | Mark Christian, Anna Christian | Cycle sport | United Kingdom ( Isle of Man) |
| | Daniele Cinciarini (in Italian), Andrea Cinciarini | Basketball | Italy |
| | Paul Clarke, Steve Clarke | Association football | United Kingdom ( Scotland) |
| | Cesare Cipollini, Mario Cipollini | Road bicycle racing | Italy |
| | Libby Clegg, James Clegg, Stephen Clegg | Para-sport | United Kingdom ( Scotland, England) |
| Ray Clemence | Stephen Clemence | Association football | United Kingdom ( England) |
| Lei Clijsters | Kim Clijsters, Elke Clijsters | Association football / Tennis | Belgium |
| Skiing Cochrans | | Alpine skiing | United States |
| Barbara Cochran | Ryan Cochran-Siegle | Alpine skiing | United States |
| Lindy Cochran | Tim Kelley, Robby Kelley | Alpine skiing | United States |
| | Jerry Codinera, Harmon Codinera & Pat Codinera | Basketball | Philippines |
Peter McColgan,
Liz McColgan (divorced) | Eilish McColgan | Track and field | United Kingdom ( Northern Ireland
Scotland) |
| Andy Cole | Devante Cole | Association football | United Kingdom ( England) |
| Joe P. Coleman | Joe H. Coleman | Baseball | United States |
| Joe H. Coleman | Casey Coleman | Baseball | United States |
| Rob Collard | Ricky Collard, Jordan Collard | Auto racing | United Kingdom ( England) |
| | Stefano Coletti, Alexandra Coletti | Auto racing / Alpine skiing |  Monaco |
| | Luís Pérez Companc, Pablo Pérez Companc | Auto racing | Argentina |
| Sérgio Marceneiro da Conceição | Sérgio Fernandes da Conceição, Rodrigo Conceição, Francisco Conceição | Auto racing | Argentina |
| Charles Coody (grandfather) | Parker Coody, Pierceson Coody (twin grandsons) | Golf | United States |
| Amber Cope | Angela Ruch | Stock car racing | United States |
| | Katherine Copely, Dean Copely | Ice dancing | United States |
| | Fausto Coppi, Serse Coppi | Cycle sport | Italy |
| | Tim Coronel, Tom Coronel | Motorsport | Netherlands |
| Gabriel Correa | Yannel Correa | Association football | Uruguay
Spain |
| | Thibaut Courtois, Valérie Courtois | Association football / Volleyball | Belgium |
| Lloyd Cowan | Dwayne Cowan[2] | Track and field | United Kingdom ( England) |
| Colette Crabbé | Claire Michel | Swimming / Triathlon | Belgium |
| | Matthew Crampton, Jessica Crampton | Track cycling | Great Britain ( England) |
| | Chandra Crawford, Rosanna Crawford | Cross-country skiing / Biathlon | Canada |
| Johan Cruyff | Jordi Cruyff | Association football | Netherlands |
| László Cseh Sr. | László Cseh | Swimming |  Hungary |
| Fabio Cudicini | Carlo Cudicini | Association football | Italy |
| | Marko Ćuk, Miloš Ćuk | Water polo | Serbia |
| Randall Cunningham | Randall Cunningham II,
Vashti Cunningham | American football
Track and field | United States |
| Dell Curry | Stephen Curry, Seth Curry | Basketball | United States |
| | Irene Curtoni, Elena Curtoni | Alpine skiing | Italy |
| | Michael Czyborra, Lennart Czyborra | Association football | Germany |
| Hans Daams | Jessie Daams | Road bicycle racing | Netherlands
Belgium |
| Derek Daly | Conor Daly | Auto racing | Ireland
United States |
| | Nina Daniels, Lisa Daniels | Synchronised swimming | New Zealand |
| Predrag Danilović | Olga Danilović | Basketball
Tennis |  Serbia and Montenegro
Serbia |
| Pál Dárdai (grandfather) | Pál Dárdai (father) | Association football | Hungary |
| Pál Dárdai (father) | Palkó Dárdai, Márton Dárdai (grandson) | Association football | Hungary
Germany/ Hungary |
| Nigel Davies | Sam Davies | Rugby union | United Kingdom ( Wales) |
| | Billy Davies, John Davies | Association football | United Kingdom ( Scotland) |
| | Alex Davison, Will Davison | Auto racing | Australia |
| | Julian de Guzman, Jonathan de Guzmán | Association football | Canada
Netherlands |
| | Mekseb Debesay, Mossana Debesai | Cycle sport |  Eritrea |
| Brian Deegan | Hailie Deegan | Freestyle motocross
Auto racing | United States |
| Iván DeJesús | Iván DeJesús Jr. | Baseball |  Puerto Rico |
| Jean-Denis Delétraz | Louis Delétraz | Motorsport | Switzerland |
| | Walter Delle Karth, Werner Delle Karth | Bobsleigh | Austria |
| Werner Delle Karth | Nico Delle Karth | Bobsleigh, Sailing | Austria |
| | Véronique Delobel, Isabelle Delobel | Ice dancing | France |
| Grégoire De Mévius | Guillaume De Mévius | Rallying | Belgium |
Phil Dent,
Betty Ann Grubb Stuart | Brett Hansen-Dent (step-son), Taylor Dent | Tennis | Australia
United States |
| | Laurens De Plus, Jasper De Plus | Cycle sport | Belgium |
| Delino DeShields | Delino DeShields Jr.
Diamond DeShields | Baseball
Basketball | United States |
| | Nate Diaz, Nick Diaz | Mixed martial arts | United States |
| Djalma Dias | Djalminha | Association football | Brazil |
| | Ejegayehu Dibaba, Tirunesh Dibaba, Genzebe Dibaba | Track and field |  Ethiopia |
| | Peter Dibben, Jonathan Dibben | Cycle sport | Great Britain ( England) |
| Michael DiBiase | Ted DiBiase | Professional wrestling | United States |
| Ted DiBiase | Ted DiBiase Jr., Mike DiBiase II, Brett DiBiase | Professional wrestling | United States |
| | Manuela Di Centa, Giorgio Di Centa | Cross-country skiing | Italy |
| Lucien Didier | Laurent Didier | Road bicycle racing |  Luxembourg |
| Jeremy Dier | Eric Dier | Tennis
Association football | Great Britain ( England) |
| | Mick van Dijke, Tim van Dijke | Cycle sport | Netherlands |
| Adnan Dirjal | Muhannad Darjal | Association football |  Iraq |
| Jean Djorkaeff | Youri Djorkaeff | Association football | France |
| | William Dod, Lottie Dod | Archery | United Kingdom ( England) |
| | Reginald Doherty, Laurence Doherty | Tennis | United Kingdom |
| | José Dolhem, Didier Pironi | Auto racing | France |
| Tie Domi | Max Domi | Ice hockey | Canada |
| Mick Doohan | Jack Doohan | Motorcycle racing, Auto racing | Australia |
| Pat Doran | Liam Doran | Rallycross | United Kingdom ( England) |
| Pierre-Antoine Dossevi | Thomas Dossevi, Mathieu Dossevi | Association football |  Togo
France |
| David Downey | Ray Downey | Boxing | Canada |
| Phil Dowsett | Alex Dowsett | Motorsport, cycle sport | United Kingdom |
| | Goran Dragić, Zoran Dragić | Basketball |  Slovenia |
| | Dick Dreissigacker, Pete Dreissigacker | Rowing | United States |
| Dick Dreissigacker, Judy Geer | Hannah Dreissigacker, Emily Dreissigacker | Rowing, biathlon, cross-country skiing | United States |
| | Kelly Druyts, Gerry Druyts, Demmy Druyts, Jessy Druyts, Lenny Druyts | Cycle sport | Belgium |
| | Douglas Dryburgh, James Dryburgh | Curling | Great Britain ( Scotland) |
| | Paul Duchesnay, Isabelle Duchesnay | Ice dancing | France
Canada |
| | Maxime Dufour-Lapointe, Chloé Dufour-Lapointe, Justine Dufour-Lapointe | Freestyle skiing moguls | Canada |
| | Denise Dupont, Madeleine Dupont, Oliver Dupont | Curling | Denmark |
| Dainis Dukurs | Tomass Dukurs, Martins Dukurs | Skeleton | Latvia |
| Greg Duplantis, Helena Hedlund | Andreas Duplantis, Antoine Duplantis, Armand Duplantis, Johanna Duplantis | Pole vault / Track and field / Baseball | United States
Sweden |
| | Jason Dungjen, Susan Dungjen | Figure skating | United States |
| | Joey Dunlop, Robert Dunlop | Motorcycle Racing | United Kingdom ( Northern Ireland) |
| Robert Dunlop | William Dunlop, Michael Dunlop | Motorcycle Racing | United Kingdom ( Northern Ireland) |
| | Conor Dunne, Katy Dunne | Road bicycle racing / Tennis | Ireland
United Kingdom ( England) |
| Peter Dürr | Lena Dürr | Alpine skiing | Germany |
| | Hollie Dykes, Lyndon Dykes | Artistic gymnastics, association football | Australia
United Kingdom ( Scotland) |
| Ralph Earnhardt | Dale Earnhardt | Auto racing | United States |
| Dale Earnhardt | Dale Earnhardt Jr., Kerry Earnhardt | Auto racing | United States |
| Kerry Earnhardt | Jeffrey Earnhardt, Bobby Earnhardt | Auto racing | United States |
| | Guy East, Andrew East | Track cycling
American football | United States |
| | Tobias Eberhard, Julian Eberhard | Biathlon | Austria |
| | Stian Eckhoff, Tiril Eckhoff | Biathlon | Norway |
| Alfred Eder | Simon Eder | Biathlon | Austria |
| | Sylvia Eder, Elfi Eder | Alpine skiing | Austria |
| | Annette Edmondson, Alex Edmondson | Cycle sport | Australia |
| Vilhjálmur Einarsson | Einar Vilhjálmsson | Track and field | Iceland |
| | Attila Elek, György Elek | Ice dancing | Hungary |
| | Mark Ella, Glen Ella, Gary Ella, Marcia Ella | Rugby union | Australia |
| Bill Elliott | Chase Elliott | Stock car racing | United States |
| | Dean Ellison, James Ellison | Motorcycle racing | United Kingdom ( England) |
| Yehia Emam and Hamada Emam | Hazem Emam | Association football |  Egypt |
| Yves Ehrlacher, Cathy Muller | Yann Ehrlacher | Association football, motorsport | France |
| | Juvenal Edjogo-Owono, Alberto Edjogo-Owono | Association football |  Equatorial Guinea
Spain |
| | Vicente Engonga, Óscar Engonga | Association football | Spain |
| Óscar Engonga | Igor Engonga | Association football | Spain
Equatorial Guinea |
| | Juan Epitié, Rubén Epitié | Association football | Equatorial Guinea
Spain |
| Philippe Ermenault | Corentin Ermenault | Cycle sport | France |
| Sergio Escudero | Sergio Escudero | Association football | Argentina
Japan
Spain |
| | Aleix Espargaró, Pol Espargaró | Motorcycle racing | Spain |
| Daniel Esposito | Chloe Esposito, Max Esposito | Modern pentathlon | Australia |
| | Jonny Evans, Corry Evans | Association football | United Kingdom ( Northern Ireland) |
| | Fred Evans, Aja Evans | American football / Bobsleigh | United States |
| Gwyndaf Evans | Elfyn Evans | Rallying | United Kingdom ( Wales) |
| Ros Evans | Neah Evans | Fell running, orienteering, cross-country skiing, cycle sport | Great Britain ( Scotland) |
| | Simon Evans, Mitch Evans | Motor racing | New Zealand |
| Patrick Evenepoel | Remco Evenepoel | Cycle sport | Belgium |
| Patrick Ewing | Patrick Ewing Jr. | Basketball |  Jamaica
United States |
| Chris Eubank | Chris Eubank Jr. | Boxing | United Kingdom ( England) |
| Cecil Exum | Dante Exum | Basketball | United States
Australia |
| Oddmar Færø (grandfather) | Odmar Færø (father) | Association football |  Faeroe Islands |
| Odmar Færø (father) | Odmar Færø (grandson) | Association football | Faeroe Islands |
| | Teo Fabi, Corrado Fabi | Motorsport | Italy |
| | Wagnney Fabiano, Leonardo Santos | Mixed martial arts | Brazil |
| Steve Fairbairn | Ian Fairbairn | Rowing | Australia
United Kingdom ( England) |
| | Miguel Ángel Falasca, Guillermo Falasca | Volleyball | Spain
Argentina |
| | Esquiva Falcão, Yamaguchi Falcão | Boxing | Brazil |
| Kuli Faletau | Taulupe Faletau | Rugby union |  Tonga
United Kingdom ( Wales) |
| | Elena Fanchini, Nadia Fanchini, Sabrina Fanchini | Alpine skiing | Italy |
| Fandi Ahmad | Irfan Fandi, Ikhsan Fandi, Ilhan Fandi | Association football |  Singapore |
| | Romy Farah, Robert Farah | Tennis |  Colombia |
| | Duarte Félix da Costa, António Félix da Costa | Auto racing | Portugal |
| | Wes Felix, Allyson Felix | Sprinting | United States |
| | Josef Fendt, Andrea Fendt | Luge | Germany |
| Jorge Fernandez | Leylah Fernandez | Association football
Tennis |  Ecuador
Canada |
| | Rio Ferdinand, Anton Ferdinand | Association football | United Kingdom ( England) |
| | Bia Feres, Branca Feres | Synchronized swimming | Brazil |
| Alex Ferguson | Darren Ferguson | Association football | United Kingdom ( Scotland) |
| | Derek Ferguson, Barry Ferguson | Association football | United Kingdom ( Scotland) |
| Barry Ferguson | Kyle Ferguson | Association football | United Kingdom ( Scotland) |
| Derek Ferguson | Lewis Ferguson | Association football | United Kingdom ( Scotland) |
| | Francisco Fernández Ochoa, Blanca Fernández Ochoa | Alpine skiing | Spain) |
| Sepp Ferstl | Josef Ferstl | Alpine skiing | Germany |
| Vasily Georgiyevich Fesikov | Sergey Fesikov | Volleyball
Swimming | Russia |
| Monika Feuersinger (in German) | Therese Feuersinger (in German) | Triathlon | Austria |
| | Paulína Fialková, Ivona Fialková | Biathlon |  Slovakia |
| Giovanni Fidanza | Arianna Fidanza, Martina Fidanza | Cycle sport | Italy |
| Tonga Fifita | Tevita Fifita, Alipate Leone | Professional wrestling | Tonga
United States |
| | Jaime Fillol, Álvaro Fillol | Tennis |  Chile |
| Jaime Fillol | Jaime Fillol Jr. | Tennis | Chile |
| | Ralph Firman, Natasha Firman | Motorsport | Ireland
United Kingdom ( England) |
| | Hans Peter Fischnaller, Dominik Fischnaller | Luge | Italy |
| Alastair Fisher | Colin Fisher | Rugby union | United Kingdom ( Scotland) |
| | Niamh Fisher-Black, Finn Fisher-Black | Cycle sport | New Zealand |
| | Wilson Fittipaldi Júnior, Emerson Fittipaldi | Auto racing | Brazil |
| Wilson Fittipaldi Júnior | Christian Fittipaldi | Auto racing | Brazil |
| | Pietro Fittipaldi, Enzo Fittipaldi | Auto racing | Brazil |
| | Bryan Fletcher, Taylor Fletcher | Nordic combined | United States |
| Richard Fliehr | David Fliehr, Ashley Fliehr, Reid Fliehr | Professional wrestling | United States |
| | Jostein Flo, Jarle Flo, Tore André Flo | Association football | Norway |
| | Lukas Flückiger, Mathias Flückiger | Mountain bike racing | Switzerland |
| | Simon Fourcade, Martin Fourcade | Biathlon, cross-country skiing | France |
| | Dario Franchitti, Marino Franchitti | Auto racing | United Kingdom ( Scotland) |
| Sunil Gavaskar | Rohan Gavaskar | Cricket | India |
| Patrick Frary | Roy Bevis | Professional wrestling | United Kingdom ( England) |
Patrick Frary
Julia Hamer | Saraya Bevis, Zak Frary | Professional wrestling | United Kingdom ( England) |
| Mario Frick | Yanik Frick | Association football |  Liechtenstein |
| | Alejandro Foglia, Andrea Foglia | Sailing | Uruguay |
| John Force | Ashley Force Hood, Brittany Force, Courtney Force | Drag racing | United States |
| George Foreman | George Foreman III | Boxing | United States |
| Pablo Forlán | Diego Forlán | Association football | Uruguay |
| | Richard Fox, Rachel Crosbee | Canoe slalom | United Kingdom ( England) |
| Richard Fox, Myriam Fox-Jerusalmi | Jessica Fox, Noemie Fox | Canoe slalom | United Kingdom ( England)
France
Australia |
| Bill France Sr. | Bill France Jr., Jim France | Auto racing | United States |
| Bill France Jr. | Brian France, Lesa France Kennedy | Auto racing | United States |
| Joe Frazier | Jackie Frazier-Lyde | Boxing | United States |
| | Uwe Freimuth, Jörg Freimuth | Track and field | East Germany |
| Uwe Freimuth | Rico Freimuth | Track and field | East Germany
Germany |
| Peter Frischknecht (in French) (grandfather) | Thomas Frischknecht (in French) (father) | Cycle sport | Switzerland |
| Thomas Frischknecht (in French) (father) | Andri Frischknecht (in French) (grandson) | Mountain bike racing | Switzerland |
Guy Fritz
Kathy May | Taylor Fritz | Tennis | United States |
| Christof Frommelt | Willi Frommelt, Paul Frommelt | Cross-country skiing
Alpine skiing | Liechtenstein |
| | Lado Fumic (in German), Manuel Fumic | Mountain bike racing | Germany |
| Gabre Gabric | Eddy Ottoz | Track and field | Croatia
Italy |
| Tonči Gabrić | Drago Gabrić, Paškvalina Gabrić | Association football | Croatia |
| Marcelo Gallardo | Nahuel Gallardo | Association football | Argentina |
| Vittorio Gallinari | Danilo Gallinari | Basketball | Italy |
| | Alain Gallopin (in French), Joel Gallopin, Guy Gallopin | Cycle sport | France |
| Joel Gallopin | Tony Gallopin | Cycle sport | France |
| Bebeto (José Roberto Gama de Oliveira) | Mattheus | Association football | Brazil |
| Marco Ganna | Filippo Ganna | Canoe sprint
Cycle sport | Italy |
| Wayne Gardner | Remy Gardner | Motorcycle racing | Australia |
| | Lucy Garner, Grace Garner | Road bicycle racing | United Kingdom ( England) |
| | Agnieszka Gąsienica-Daniel, Maryna Gąsienica-Daniel | Alpine skiing | Poland |
| | Helena Gąsienica Daniel, Maria Gąsienica Daniel-Szatkowska | Cross-country skiing, alpine skiing | Poland |
| | Pau Gasol, Marc Gasol | Basketball | Spain |
| | Selina Gasparin, Elisa Gasparin, Aita Gasparin | Biathlon | Switzerland |
| | Sebastiano Gastaldi, Nicol Gastaldi | Alpine skiing | Argentina |
| | Elene Gedevanishvili, Dimitri Gedevanishvili | Figure skating
Alpine skiing |  Georgia |
| | Judy Geer, Charlotte Geer | Rowing | United States |
| Archie Gemmill | Scot Gemmill | Association football | United Kingdom ( Scotland) |
| | Jordi Gené, Marc Gené | Auto racing | Spain |
| | Riccardo De Gennaro, Giovanni De Gennaro | Canoe slalom | Italy |
| Ferdinando Gentile | Alessandro Gentile, Stefano Gentile | Basketball | Italy |
| | Francisco Gento, Julio Gento (in Spanish), Antonio Gento (in Spanish) | Association football | Spain |
| Aladár Gerevich | Pál Gerevich | Fencing | Hungary |
| | Abdelkader Ghezzal, Rachid Ghezzal | Association football |  Algeria |
| | Philippe Gilbert, Jérôme Gilbert | Cycle sport | Belgium |
| Maurice Gillen | Lucien Gillen | Cycle sport | Luxembourg |
| | Todd Gilles, Piper Gilles, Alexe Gilles | Ice dancing | United States |
| David Gillow | Shara Gillow | Cycle sport |  Zimbabwe
Australia |
| Graeme Gilmore | Matthew Gilmore | Cycle sport | Australia
Belgium |
| | Néstor Girolami, Franco Girolami | Motorsport | Argentina |
| | Dominique Gisin, Marc Gisin, Michelle Gisin | Alpine skiing | Switzerland |
| | Ilja Glebov, Jelena Glebova | Figure skating |  Estonia |
| Gerhard Gleirscher | David Gleirscher, Nico Gleirscher | Luge | Austria |
| | Mario Götze, Fabian Götze, Felix Götze | Association football | Germany |
| | Francesc Godoy, Anna Godoy | Triathlon | Spain |
| | Christine Goitschel, Marielle Goitschel | Alpine skiing | France |
| | Carly Gold, Gracie Gold | Figure skating | United States |
| | Taylor Gold, Arielle Gold | Snowboarding Half-pipe | United States |
| Andrés Gómez | Emilio Gómez | Tennis | Ecuador |
| | Héctor González (El Turbo), Raúl González Guzmán (El Pollo) | Association football | Venezuela |
| Pullela Gopichand | PVV Lakshmi | Badminton | India |
| Tom "Flash" Gordon | Dee Gordon | Baseball | United States |
| Alexei Gorshkov | Anastasia Gorshkova | Ice dancing | Russia |
| Jean-Marc Gounon | Jules Gounon | Motor racing | France |
| Christian Gourcuff | Yoann Gourcuff | Association football | France |
| | Torben Grael, Lars Grael | Sailing | Brazil |
| Grace family | | Cricket | United Kingdom ( England) |
| Gracie family | Scores of family members, spanning four generations in competitive martial arts | Brazilian jiu-jitsu / Mixed martial arts | Brazil
United States |
| | François-Cyrille Grange, Jean-Baptiste Grange | Alpine skiing | France |
| | Marcel Granollers, Gerard Granollers | Tennis | Spain |
| | Horace Grant, Harvey Grant | Basketball | United States |
| | Logan Gray, Lauren Gray | Curling | Great Britain ( Scotland) |
| Dick Greenwood | Will Greenwood | Rugby union | United Kingdom ( England) |
| Ken Griffey Sr. | Ken Griffey Jr. | Baseball | United States |
| Reinier Groenendaal | Richard Groenendaal | Cyclo-cross | Netherlands |
| Marcus Grönholm | Niclas Grönholm | Rallying |  Finland |
| | Jannie de Groot, Daan de Groot | Swimming / Cycle sport | Netherlands |
| | Christine von Grünigen, Michael von Grünigen | Alpine skiing | Switzerland |
| Michael von Grünigen | Noel von Grünigen | Alpine skiing | Switzerland |
| Nebojša Gudelj | Nemanja Gudelj, Dragiša Gudelj | Association football | Serbia
Netherlands |
| Domingos da Guia | Ademir da Guia | Association football | Brazil |
| Matt Guokas Sr. | Matt Guokas | Basketball | United States |
| Arnór Guðjohnsen | Eiður Guðjohnsen | Association football | ![]()
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