Namesakes
Eugene O'Neill
(m) 1888-1953 
Nobel Prize Winners 1936 (literature)
Notable Writers
Ed O'Neill
(m) 1946-
Notable Actors and Entertainers (actor)
Jack O'Neill
(m)
Fictional Characters from Movies 1994 Stargate
Fictional Characters from Television 1997 Stargate SG-1
Jennifer O'Neill
(f) 1948-
Notable Actors and Entertainers (actor)
Susie O'Neill
(f) 1973-
Olympic Medalists 1992; 1996; 2000 swimming - 200 m butterfly; swimming - 200 m freestyle; swimming - 4x100 m medley relay; swimming - 4x200 m freestyle relay (bronze/gold/silver)
Michael O'Neill
(m) 1951-
Notable Actors and Entertainers (actor)
Maire O'Neill
(f) 1886-1952
Notable Actors and Entertainers (actor)
Naoise O'Neill
(f)
Fictional Characters from Television 1999 Family Law