Namesakes
Australian Prime Ministers:
1 prime minister
Harold Holt 1966-1967 
British Prime Ministers:
2 prime ministers
Harold Macmillan 1957-1963
Harold Wilson 1964-1970; 1974-1976
Danish Kings and Queens:
3 kings
King Harald I Bluetooth (a.k.a. Harold) 958-986
King Harald II (a.k.a. Harold) 1014-1018
King Harald III Hen (a.k.a. Harold) 1074-1080
Emmy Award Winners:
1 actor
(actor) Hal Holbrook 1971 The Bold Ones: The Senator
English and British Kings and Queens:
2 kings
King Harold I Harefoot 1035-1040
King Harold II 1066
Fictional Characters from Books:
1 character
Harold Fry 2012 The Unlikely Pilgrimage of Harold Fry
Fictional Characters from Plays and Musicals:
1 character
Harold Hill 1957 The Music Man
Fictional Characters from Song Titles:
1 character
(character) Harold 2010 The Harold Song
Fictional Characters from Television:
6 characters
Harold Bishop 1985 Neighbours
Harold Berman 1996 Hey Arnold!
Bright Abbott (a.k.a. Harold) 2002 Everwood
Harold Abbott 2002 Everwood
Harry Crane 2007 Mad Men
Harold Finch 2011 Person of Interest
Hall-of-Famers:
6 ice hockey, 5 baseball, 2 basketball, 2 football
(baseball) Pie Traynor (a.k.a. Harold) 1948
(ice hockey) Harry Hyland 1962
(ice hockey) Harry Cameron 1962
(ice hockey) Harry "Punch" Broadbent 1962
(ice hockey) Harry "Moose" Watson 1962
(football) Harold "Red" Grange 1963
(basketball) Harold "Bud" Foster 1964
(ice hockey) Harry Oliver 1967
(basketball) Hal Greer 1981
(baseball) Harold "Pee Wee" Reese 1984
(baseball) Hal Newhouser 1992
(ice hockey) Harry "Whipper" Watson 1994
(baseball) Doug Harvey (a.k.a. Harold) 2010
(baseball) Harold Baines 2019
(football) Harold Carmichael 2020
Hurricanes and Tropical Storms:
1 storm
Storm Harold 2023
Most Valuable Players:
1 winner
Hal Newhouser 1944; 1945 baseball
Nobel Prize Winners:
2 chemistry, 1 literature, 1 medicine
(chemistry) Harold Urey 1934
(chemistry) Derek Barton (middle name Harold) 1969
(medicine) Harold E. Varmus 1989
(literature) Harold Pinter 2005
Norwegian Kings and Queens:
5 kings
King Harald I Fairhair (a.k.a. Harold) 872-930
King Harald II Greycloak (a.k.a. Harold) 961-970
King Harald III Hardrada (a.k.a. Harold) 1046-1066
King Harald IV Gille (a.k.a. Harold) 1130-1136
King Harald V (a.k.a. Harold) 1991-
Notable Activists and Revolutionaries:
1 social activist
(social activist) Harry Belafonte (a.k.a. Harold) 1927-2023
Notable Actors and Entertainers:
17 actors
Harry Davenport 1866-1949
Harold Lloyd 1893-1971
Bruce Bennett (a.k.a. Harold) 1906-2007
Griffith Jones (a.k.a. Harold) 1909-2007
Jay Silverheels (a.k.a. Harold) 1912-1980
Harold Russell 1914-2002
Hal Smith 1916-1994
Howard Keel (a.k.a. Harold) 1919-2004
Hal Holbrook 1925-2021
Rock Hudson (middle name Harold) 1925-1985
Harry Guardino 1925-1995
Harry Belafonte (a.k.a. Harold) 1927-2023
Hal Linden (a.k.a. Harold) 1931-
David Janssen (middle name Harold) 1931-1980
Harold Ramis 1944-2014
Stephen Tobolowsky (middle name Harold) 1951-
Harold Perrineau 1963-
Notable Athletes:
2 ice hockey, 1 baseball, 1 basketball, 1 football, 1 soccer
(ice hockey) Harry "Punch" Broadbent 1892-1971
(ice hockey) Harry "Moose" Watson 1898-1957
(football) Harold "Red" Grange 1903-1991
(baseball) Harold "Pee Wee" Reese 1918-1999
(basketball) Hal Greer 1936-2018
(soccer) Kenneth Vermeer (middle name Harold) 1986-
Notable Businesspeople:
1 businessperson
John H. Johnson (middle name Harold) 1918-2005
Notable Evildoers:
1 murderer
Harold Shipman 1946-2004
Notable Filmmakers:
2 directors, 1 producer/screenwriter
Hal Roach 1892-1992
Harold Ramis 1944-2014
Benh Zeitlin (middle name Harold) 1982-
Notable Musicians:
3 musicians
Harry Belafonte (a.k.a. Harold) 1927-2023
Hal Blaine (a.k.a. Harold) 1929-2019
Brian May (middle name Harold) 1947-
Notable Philosophers and Thinkers:
1 mathematician
G. H. Hardy (middle name Harold) 1877-1947
Notable Scientists and Inventors:
1 chemist
Harold Urey 1893-1981
Notable Writers:
1 author, 1 author/playwright/poet, 1 playwright
Harold Courlander 1908-1996
Harold Robbins 1916-1997
Harold Pinter 1930-2008
Olympic Medalists:
9 gold, 7 silver, 3 bronze, 2 gold/silver, 1 bronze/gold, 1 bronze/silver/gold, 1 gold/silver/bronze
(gold) Edwin Flack (middle name Harold) 1896 1500 m
(silver) Harold A. Wilson 1908 1500 m
(bronze/gold) Harold Hardwick 1912 swimming - 1500 m freestyle; swimming - 400 m freestyle; swimming - 4x200 m freestyle relay
(silver) Harold Barron 1920 110 m hurdles
(bronze) Harold Annison 1920 swimming - 4x200 m freestyle relay
(silver) Harold Muller 1920 high jump
(bronze) Harold Clarke 1924 diving - plain high
(gold) Harold Osborn 1924 decathlon; high jump
(gold/silver) Harold Abrahams 1924 100 m; 4x100 m relay
(silver) Walter Harold Porter 1924 3000 m team
(silver) Bruce Bennett (a.k.a. Harold) 1928 shot put
(gold) George Kojac (middle name Harold) 1928 swimming - 100 m backstroke; swimming - 4x200 m freestyle relay
(bronze) Charles McCallister (middle name Harold) 1932 water polo
(gold/silver) Harold Smith 1932 diving - platform; diving - springboard
(bronze/silver/gold) Ralph Metcalfe Sr. (middle name Harold) 1932; 1936 200 m; 100 m; 4x100 m relay
(gold) Hack Simpson (a.k.a. Harold) 1932 ice hockey
(gold) Harold Whitlock 1936 50 km walk
(silver) Harold D. Cagle 1936 4x400 m relay
(gold) Arthur Harnden (middle name Harold) 1948 4x400 m relay
(gold) Hal Connolly 1956 hammer throw
(silver) Blaine Lindgren (a.k.a. Harold) 1964 110 m hurdles
(gold) Thompson Mann (a.k.a. Harold) 1964 swimming - 4x100 m medley relay
(gold/silver/bronze) Ralph Boston (middle name Harold) 1960; 1964; 1968 long jump
(gold) Kurt Ainsworth (middle name Harold) 2000 baseball
Oscar Award Winners:
1 actor
(actor) Harold Russell 1947 The Best Years of Our Lives
Other Leaders:
1 prime minister
Prime Minister Harold Bernard St. John 1985-1986 Barbados
Other Religious Leaders:
1 leader
Harold B. Lee 1972-1973 The Church of Jesus Christ of Latter-day Saints
Pulitzer Award Winners:
1 literature
(literature) Harold L. Davis 1936 Honey in the Horn
Rock and Roll Hall-of-Famers:
3 musicians
Gene Clark (a.k.a. Harold) 1991 The Byrds
Brian May (middle name Harold) 2001 Queen
Allan Clarke (a.k.a. Harold) 2010 The Hollies
Saints:
1 saint
Saint Harold ?-1168