Namesakes
Bulgarian Presidents and Prime Ministers:
1 prime minister
(prime minister) Sergei Stanishev 2005-2009 
Fictional Characters from Television:
1 character
Walter Skinner (a.k.a. Sergei) 1993 The X-Files
Hall-of-Famers:
3 ice hockey, 1 basketball
(basketball) Sergei Belov 1992
(ice hockey) Sergei Fedorov 2015
(ice hockey) Sergei Makarov 2016
(ice hockey) Sergei Zubov 2019
Most Valuable Players:
1 winner
Sergei Fedorov 1994 ice hockey
Notable Activists and Revolutionaries:
1 activist
(activist) Syarhey Tsikhanouski (a.k.a. Sergei) 1978-
Notable Actors and Entertainers:
1 actor
Ivan Sergei (a.k.a. Sergei) 1971-
Notable Athletes:
3 ice hockey, 2 basketball, 1 soccer
(basketball) Sergei Belov 1944-2013
(ice hockey) Sergei Makarov 1958-
(ice hockey) Sergei Fedorov 1969-
(ice hockey) Sergei Zubov 1970-
(soccer) Sergei Ignashevich 1979-
(basketball) Sergei Monia 1983-
Notable Businesspeople:
1 businessperson
Sergei Diaghilev 1872-1929
Notable Filmmakers:
2 directors
Sergei Eisenstein 1898-1948
Sergei Parajanov 1924-1990
Notable Musicians:
2 composers
Sergei Rachmaninoff 1873-1943
Sergei Prokofiev 1891-1953
Notable Scientists and Inventors:
1 engineer, 1 physician
Sergei Korsakov 1854-1900
Sergei Korolev 1907-1966
Notable Writers:
1 poet
Sergei Yesenin 1895-1925
Olympic Medalists:
3 bronze/gold, 2 bronze, 2 gold/bronze, 1 gold/silver, 1 silver, 1 silver/bronze, 1 silver/gold
(bronze/gold) Sergei Kovalenko 1968; 1972 basketball
(gold/bronze) Sergei Belov 1968; 1972; 1976; 1980 basketball
(bronze) Sergei Zhelanov 1980 decathlon
(silver) Sergei Shakhrai 1980 figure skating
(silver/gold) Sergey Koplyakov (a.k.a. Sergei) 1976; 1980 swimming - 200 m freestyle; swimming - 4x100 m medley relay; swimming - 4x200 m freestyle relay
(gold/silver) Sergei Fesenko 1980 swimming - 200 m butterfly; swimming - 400 m medley
(gold/bronze) Sergey Kotenko (a.k.a. Sergei) 1980; 1988 water polo
(bronze/gold) Sergei Tarakanov 1980; 1988 basketball
(bronze/gold) Sergei Martynov 2000; 2004; 2012 shooting
(silver/bronze) Sergei Garbuzov 2000; 2004 water polo
(bronze) Sergei Monia 2012 basketball
Other Leaders:
1 prime minister
Prime Minister Sergei Sidorsky 2003-2010 Belarus