Namesakes

Belgian Prime Ministers: 1 prime minister
Leo Tindemans   1974-1978  
Bishops of Rome and the Popes: 13 popes
Leo I the Great   440-461  
Leo II   682-683  
Leo III   795-816  
Leo IV   847-855  
Leo V   903  
Leo VI   928  
Leo VII   936-939  
Leo VIII   964-965  
Leo IX   1049-1054  
Leo X   1513-1521  
Leo XI   1605  
Leo XII   1823-1829  
Leo XIII   1878-1903  
Characters in Greek Mythology: 1 character
Leo   (m)  
Fictional Characters from Television: 1 character, 1 hero
Leo Wyatt   1998   Charmed  
Leo Fisher   1999   Once and Again  
German Chancellors and Presidents: 1 chancellor
(chancellor) Leo von Caprivi   1890-1894  
Hall-of-Famers: 1 baseball, 1 football, 1 ice hockey
(football) Leo Nomellini   1969  
(ice hockey) Leo Boivin   1986  
(baseball) Leo Durocher   1994  
Nobel Prize Winners: 1 physics
(physics) Leo Esaki   1973  
Notable Actors and Actresses: 2 actors
Leo McKern   1920-2002  
Branscombe Richmond (a.k.a. Leo)   1955-  
Notable Athletes: 1 football, 1 ice hockey
(football) Leo Nomellini   1924-2000  
(ice hockey) Leo Boivin   1932-  
Notable Businesspeople: 1 businessperson
Leo Fender   1909-1991  
Notable Filmmakers: 2 directors
Leo McCarey   1898-1969  
Joseph L. Mankiewicz (a.k.a. Leo)   1909-1993  
Notable Musicians: 1 composer, 1 musician, 1 singer/musician
Léo Delibes   1836-1891     
Norman "Fatboy Slim" Cook (a.k.a. Leo)   1963-   big beat  
Dan Sultan (a.k.a. Leo)   1983-   rock  
Notable Scientists and Inventors: 1 inventor
Leo Fender   1909-1991  
Notable Writers: 1 author
Leo Tolstoy   1828-1910  
Olympic Medalists: 5 bronze, 3 silver, 2 gold/bronze, 1 gold, 1 silver/bronze
(gold/bronze) Leo Goodwin   1904; 1908   diving - plunge for distance; swimming - 4x50 yard freestyle relay; water polo; swimming - 4x200 m freestyle relay  
(bronze) Leo Larrivee   1924   3000 m team  
(gold) Leo Sexton   1932   shot put  
(bronze) James Dillion (a.k.a. Leo)   1952   discus throw  
(bronze) Veikko Karvonen (a.k.a. Leo)   1956   marathon  
(bronze) Leonhard Pohl (a.k.a. Leo)   1956   4x100 m relay  
(silver) Benny Nielsen (a.k.a. Leo)   1988   swimming - 200 m butterfly  
(silver/bronze) Leo Visser   1988; 1992   speed skating  
(silver) Leo Peelen   1988   cycling - track  
(gold/bronze) Leonardo Gutiérrez (a.k.a. Leo)   2004; 2008   basketball  
(silver) Leonel Manzano (a.k.a. Leo)   2012   1500 m  
(bronze) Leo Komarov   2014   ice hockey  
Oscar Award Winners: 2 directors
(director) Leo McCarey   1937; 1944   The Awful Truth; Going My Way  
(director) Joseph L. Mankiewicz (a.k.a. Leo)   1949; 1950   A Letter to Three Wives; All About Eve  
Other Leaders: 1 president, 1 prime minister
President Leo Falcam   1999-2003   Federated States of Micronesia  
Prime Minister Leo Varadkar   2017-   Ireland  
Roman and Byzantine Emperors: 7 emperors
Emperor Flavius Valerius Leo (a.k.a. Leo)   457-474  
Emperor Flavius Leo Junior (a.k.a. Leo)   474  
Emperor Leo   695-698  
Emperor Leo   717-741  
Emperor Leo   775-780  
Emperor Leo   813-820  
Emperor Leo   886-912  
Saints: 17 saints, 5 blessed
Saint Leo   ?-260  
Saint Leo the Great   c. 400-461  
Saint Leo   ?-541  
Saint Leo   ?-550  
Saint Leo II   611-683  
Saint Leo III   750-816  
Saint Leo   ?-787  
Saint Leo IV   790-855  
Saint Leo of Carentan   856-890  
Saint Leo Luke   ?-900  
Saint Leo   ?-900  
Saint Leo of Nonantula   ?-1000  
Saint Leo IX   1002-1054  
Saint Leo of Lucca   ?-1079  
Blessed Leo of Saint-Bertin   ?-1163  
Saint Leo Karasuma   ?-1597  
Saint Leo Tanaka   ?-1617  
Blessed Leo Nakanishi   ?-1619  
Saint Leo Satsuma   ?-1622  
Blessed Leo Suchiemon   ?-1622  
Blessed Leo Kombiogi   ?-1628  
Blessed Leo Ignatius Mangin   ?-1900