Namesakes
American Presidents:
1 president
Ronald Reagan 1981-1989 
Fictional Characters from Books:
1 hero
Ron Weasley 1997 Harry Potter and the Philosopher's Stone
Fictional Characters from Movies:
1 hero
Ron Weasley 2001 Harry Potter and the Philosopher's Stone
Fictional Characters from Television:
3 characters
Ron Carver 2001 Law & Order: Criminal Intent
Ronald "Mac" McDonald 2005 It's Always Sunny in Philadelphia
Ron Swanson 2009 Parks and Recreation
Hall-of-Famers:
4 football, 1 baseball, 1 basketball, 1 ice hockey
(football) Ron Mix 1979
(football) Ronnie Lott 2000
(football) Ron Yary 2001
(ice hockey) Ron Francis 2007
(baseball) Ron Santo 2012
(football) Ron Wolf 2015
(basketball) Larry Costello (middle name Ronald) 2022
Harry Potter Characters:
1 character
Ron Weasley
Nobel Prize Winners:
1 chemistry, 1 economics, 1 medicine
(medicine) Ronald Ross 1902
(chemistry) Ronald George Wreyford Norrish 1967
(economics) Ronald Coase 1991
Notable Actors and Entertainers:
18 actors, 2 actor/comedians
Ronald Colman 1891-1958
Ronald Reagan 1911-2004
Ron Moody (a.k.a. Ronald) 1924-2015
Ronald Golias 1929-2005
Ronnie Barker 1929-2005
Ronnie Corbett 1930-2016
Ken Berry (middle name Ronald) 1933-2018
Ronny Cox 1938-
Ronald Pickup 1940-2021
R. Lee Ermey (a.k.a. Ronald) 1944-2018
Ron Silver 1946-2009
James Cosmo (middle name Ronald) 1948-
Ron Canada 1949-
Ron Perlman 1950-
Ronn Moss 1952-
Ron Howard 1954-
Ron Eldard 1965-
Ron Livingston 1967-
Ronald "RJ" Cyler 1995-
Atticus Shaffer (middle name Ronald) 1998-
Notable Athletes:
5 soccer, 1 baseball, 1 billiards, 1 ice hockey
(soccer) Ron Saunders 1932-2019
(baseball) Ron Santo 1940-2010
(ice hockey) Ron Francis 1963-
(soccer) Ronald Koeman 1963-
(soccer) Ronald de Boer 1970-
(billiards) Ronnie O'Sullivan 1975-
(soccer) Jonathan Walters (middle name Ronald) 1983-
(soccer) Gino van Kessel (middle name Ronald) 1993-
Notable Filmmakers:
1 director
Ron Howard 1954-
Notable Musicians:
1 musician, 1 singer
Ron Carroll 1968-
Ron Welty 1971-
Notable Politicians and Statespeople:
3 politicians
Ron Paul 1935-
Ronald Plasterk 1957-
Ron DeSantis 1978-
Notable Scientists and Inventors:
1 physician
Ronald Ross 1857-1932
Notable Writers:
3 authors
J. R. R. Tolkien (middle name Ronald) 1892-1973
L. Ron Hubbard 1911-1986
Ronald Giphart 1965-
Olympic Medalists:
8 bronze, 8 gold, 3 silver, 2 bronze/gold, 1 silver/bronze
(gold) Ron Bontemps 1952 basketball
(gold) Ron Tomsic 1956 basketball
(gold) Ron Delany 1956 1500 m
(silver) Ron Morris 1960 pole vault
(bronze) Ron Clarke 1964 10000 m
(gold) Ronald Lopatni 1968 water polo
(silver) Jim Ryun (middle name Ronald) 1968 1500 m
(bronze/gold) Ron Freeman 1968 400 m; 4x400 m relay
(gold) Ronnie Ray Smith 1968 4x100 m relay
(bronze) Ronnie Mills 1968 swimming - 100 m backstroke
(bronze/gold) Herm Frazier (middle name Ronald) 1976 400 m; 4x400 m relay
(bronze) Bill Forrester (middle name Ronald) 1976 swimming - 200 m butterfly
(silver) Gary Honey (middle name Ronald) 1984 long jump
(bronze) Ronald Merriott 1984 diving - springboard
(gold) Ron Brown 1984 4x100 m relay
(silver/bronze) Ronald Weigel 1988; 1992 20 km walk; 50 km walk
(gold) Rexy Mainaky (middle name Ronald) 1996 badminton doubles
(gold) Marlon Devonish (middle name Ronald) 2004 4x100 m relay
(bronze) Terry Tiffee (middle name Ronald) 2008 baseball
(bronze) Ronald Pognon 2012 4x100 m relay
(bronze) Ronald Mulder 2014 speed skating
(bronze) Ronald Levy 2020 110 m hurdles
Oscar Award Winners:
1 actor, 1 director
(actor) Ronald Colman 1948 A Double Life
(director) Ron Howard 2002 A Beautiful Mind
Other Fictional Characters:
1 character
Ronald McDonald 1963 corporate mascot
Other Leaders:
1 president
President Ronald Venetiaan 1991-1996; 2000-2010 Suriname
Other Religious Leaders:
1 leader
L. Ron Hubbard 1953-1986 Church of Scientology
Rock and Roll Hall-of-Famers:
7 musicians
Ronald Isley 1992 The Isley Brothers
Ron "Pigpen" McKernan 1994 The Grateful Dead
Ron Blair 2002 Tom Petty and the Heartbreakers
Ronnie Van Zant 2006 Lynyrd Skynyrd
Ron Asheton 2010 The Stooges
Ronnie Lane 2012 Small Faces/Faces
Ronnie Wood 1989; 2012 The Rolling Stones; Small Faces/Faces
Saints:
1 saint
Saint Ronald 1100-1158