Namesakes
Fictional Characters from Books:
1 character
Jeeves (a.k.a. Reginald) 1915 Extricating Young Gussie 
Fictional Characters from Television:
2 characters
Jeeves (a.k.a. Reginald) 1990 Jeeves and Wooster
Red Forman (a.k.a. Reginald) 1998 That '70s Show
Hall-of-Famers:
3 ice hockey, 2 basketball, 1 baseball, 1 football
(ice hockey) Reg Noble 1962
(ice hockey) Reginald "Red" Horner 1965
(ice hockey) Reginald "Hooley" Smith 1972
(baseball) Reggie Jackson 1993
(football) Reggie White 2006
(basketball) Reggie Miller 2012
(basketball) Clarence "Fats" Jenkins (a.k.a. Reginald) 2021
Harry Potter Characters:
1 character
Reginald Cattermole
Most Valuable Players:
1 winner
Reggie Jackson 1973 baseball
Notable Actors and Entertainers:
3 actors
Leo McKern (a.k.a. Reginald) 1920-2002
Michael Ironside (a.k.a. Reginald) 1950-
Reg E. Cathey 1958-2018
Notable Athletes:
2 ice hockey, 1 baseball, 1 basketball, 1 football
(ice hockey) Reg Noble 1896-1962
(ice hockey) Reginald "Hooley" Smith 1903-1963
(baseball) Reggie Jackson 1946-
(football) Reggie White 1961-2004
(basketball) Reggie Miller 1965-
Notable Musicians:
2 musicians
Elton John (a.k.a. Reginald) 1947-
Reginald "Fieldy" Arvizu 1969-
Notable Writers:
1 author
Reginald Hill 1936-2012
Olympic Medalists:
4 gold, 1 bronze, 1 bronze/gold, 1 silver
(silver) Reginald Brooks-King 1908 archery - York round
(bronze/gold) Reginald Doherty 1900; 1908 tennis
(gold) Reggie Walker 1908 100 m
(bronze) Reginald Potts 1912 artistic gymnastics
(gold) Reginald "Hooley" Smith 1924 ice hockey
(gold) Reggie Miller 1996 basketball
(gold) Reggie Witherspoon 2008 4x400 m relay
Rock and Roll Hall-of-Famers:
1 musician
Elton John (a.k.a. Reginald) 1994
Saints:
1 blessed
Blessed Reginald 1183-1220