Namesakes
Eurovision Song Contest Winners:
1 winner
André Claveau (a.k.a. Marcel) 1958 France 
Hall-of-Famers:
2 ice hockey
(ice hockey) Marcel Pronovost 1978
(ice hockey) Marcel Dionne 1992
Notable Actors and Entertainers:
2 actors, 1 presenter
Marcel Marceau 1923-2007
Alain Delon (a.k.a. Marcel) 1935-2024
Marcel Vanthilt 1957-
Notable Artists:
1 fashion designer, 1 painter/sculptor
Marcel Duchamp 1887-1968
Hubert de Givenchy (a.k.a. Marcel) 1927-2018
Notable Athletes:
2 ice hockey, 1 skiing, 1 soccer, 1 tennis
(ice hockey) Marcel Pronovost 1930-2015
(ice hockey) Marcel Dionne 1951-
(tennis) Marcel Granollers 1986-
(skiing) Marcel Hirscher 1989-
(soccer) Marcel Sabitzer 1994-
Notable Musicians:
1 singer
André Claveau (a.k.a. Marcel) 1911-2003
Notable Politicians and Statespeople:
1 politician
Maxime Verhagen (a.k.a. Marcel) 1956-
Notable Scientists and Inventors:
1 astronomer
Marcel Minnaert 1893-1970
Notable Writers:
1 author
Marcel Proust 1871-1922
Olympic Medalists:
7 bronze, 3 silver
(bronze) Marcel Devenot 1900 water polo
(bronze) Maurice Norland (a.k.a. Marcel) 1924 cross country team
(bronze) Marcel Hansenne 1948 800 m
(bronze) Paul Genevay (a.k.a. Marcel) 1964 4x100 m relay
(bronze) Marcel Gery 1992 swimming - 4x100 m medley relay
(bronze) Marcel Wouda 2000 swimming - 4x200 m freestyle relay
(silver) Marcel Balkestein 2012 field hockey
(silver) Marcel Nguyen 2012 artistic gymnastics
(bronze) Raphael Holzdeppe (a.k.a. Marcel) 2012 pole vault
(silver) Marcel Hirscher 2014 alpine skiing
Romanian Presidents and Prime Ministers:
1 prime minister
(prime minister) Marcel Ciolacu 2023-
Saints:
1 blessed
Blessed Marcel Callo 1921-1945
Swiss Presidents:
1 president
Marcel Pilet-Golaz 1934; 1940