Belgian Prime Ministers: 2 prime ministers
Georges Theunis (middle name Léonard)   1921-1925; 1934-1935  
Leo Tindemans   1974-1978  
British Prime Ministers: 1 prime minister
James Callaghan (a.k.a. Leonard)   1976-1979  
Dutch Prime Ministers: 1 prime minister
Justinus van der Brugghen (middle name Leonard)   1856-1858  
Fictional Characters from Books: 1 character
Leonard Peacock   2013   Forgive Me, Leonard Peacock  
Fictional Characters from Song Titles: 2 characters
(character) Leonard   1980   Leonard  
(character) Leonard   2012   Leonard  
Fictional Characters from Television: 6 characters
Leonard "Bones" McCoy   1966   Star Trek  
Leonard Waggedorn   1968   Julia  
Lennie Briscoe (a.k.a. Leonard)   1990   Law & Order  
Leo Chingkwake   1998   That '70s Show  
Stan Smith (middle name Leonard)   2005   American Dad!  
Leonard Hofstadter   2007   The Big Bang Theory  
French Presidents and Prime Ministers: 1 prime minister
(prime minister) Léon Faucher   1851  
Hall-of-Famers: 3 football, 1 basketball, 1 ice hockey
(ice hockey) Leonard "Red" Kelly   1969  
(football) Lenny Moore   1975  
(football) Len Ford   1976  
(football) Len Dawson   1987  
(basketball) Lenny Wilkens   1989; 1998  
Nobel Prize Winners: 1 medicine, 1 physics
(physics) Arthur Leonard Schawlow   1981  
(medicine) Gregg L. Semenza (middle name Leonard)   2019  
Notable Actors and Entertainers: 12 actors, 1 comedian
Canada Lee (a.k.a. Leonard)   1907-1952  
Buddy Hackett (a.k.a. Leonard)   1924-2003  
Lenny Bruce   1925-1966  
Leonard Nimoy   1931-2015  
Leonard Frey   1938-1988  
Len Cariou   1939-  
Barry Corbin (a.k.a. Leonard)   1940-  
Gareth Hunt (middle name Leonard)   1942-2007  
Timothy Dalton (middle name Leonard)   1946-  
Ed O'Neill (middle name Leonard)   1946-  
Timothy Spall (middle name Leonard)   1957-  
Adrian Lukis (middle name Leonard)   1957-  
Joseph Gordon-Levitt (middle name Leonard)   1981-  
Notable Athletes: 2 soccer, 1 basketball, 1 football, 1 ice hockey
(ice hockey) Leonard "Red" Kelly   1927-2019  
(soccer) Leo Canjels   1933-2010  
(football) Len Dawson   1935-2022  
(basketball) Lenny Wilkens   1937-  
(soccer) Jairo Patiño (middle name Leonard)   1978-  
Notable Businesspeople: 1 businessperson
Jack L. Warner (middle name Leonard)   1892-1978  
Notable Filmmakers: 1 director
Lenny Abrahamson   1966-  
Notable Musicians: 3 musicians, 1 composer, 1 singer
Leonard Bernstein   1918-1990  
Lennie Niehaus   1929-2020  
Leonard Cohen   1934-2016  
Lenny Kravitz   1964-  
Big Sean (middle name Leonard)   1988-  
Notable Scientists and Inventors: 2 physicists
Nicolas Léonard Sadi Carnot   1796-1832  
Arthur Leonard Schawlow   1921-1999  
Notable Writers: 1 author
Eckhart Tolle (middle name Leonard)   1948-  
Olympic Medalists: 1 bronze, 1 silver
(bronze) Jimmy Tremeer (a.k.a. Leonard)   1908   400 m hurdles  
(silver) Leon Gregory   1956   4x400 m relay  
Rock and Roll Hall-of-Famers: 3 musicians
Leonard Cohen   2008     
Lenny Davidson   2008   The Dave Clark Five  
Jonathan Cain (middle name Leonard)   2017   Journey  
Saints: 4 saints, 1 blessed
Saint Leonard of Noblac   ?-559  
Saint Leonard of Vandoeuvre   ?-570  
Saint Leonardus van Veghel (a.k.a. Leonard)   ?-1572  
Blessed Leonard Kimura   ?-1619  
Saint Leonardo of Porto Maurizio (a.k.a. Leonard)   1676-1751  
Swedish Prime Ministers: 1 prime minister
Hjalmar Hammarskjöld (middle name Leonard)   1914-1917