Namesakes
Fictional Characters from Plays and Musicals:
1 character
Henry Higgins 1912; 1956 Pygmalion; My Fair Lady 
Fictional Characters from Television:
1 character
Jonathan Higgins 1980 Magnum, P.I.
Irish Presidents and Prime Ministers:
1 president
(president) Michael D. Higgins 2011-
Notable Actors and Entertainers:
1 comedian/actor
John Michael Higgins 1963-
Notable Athletes:
1 billiards
(billiards) John Higgins 1975-
Notable Musicians:
1 singer
Jarad "Juice Wrld" Higgins 1998-2019
Notable Writers:
2 authors
Mary Higgins Clark 1927-2020
Jack Higgins 1929-2022
Olympic Medalists:
1 bronze, 1 gold
(bronze) Peter Higgins 1956 4x400 m relay
(gold) Yvette Higgins 2000 water polo
Saints:
1 saint
Saint Peter Higgins 1601-1642