Namesakes
Grammy Award Winners:
1 best new artist/record of the year/song of the year/album of the year
(best new artist/record of the year/song of the year/album of the year) Billie Eilish (a.k.a. O'Connell) 2020; 2021 ; Bad Guy; When We All Fall Asleep, Where Do We Go?; Everything I Wanted 
Notable Actors and Entertainers:
4 actors
Arthur O'Connell 1908-1981
Rebecca Romijn (a.k.a. O'Connell) 1972-
Jerry O'Connell 1974-
Jack O'Connell 1990-
Notable Athletes:
1 rugby
(rugby) Paul O'Connell 1979-
Notable Musicians:
1 musician, 1 singer
Finneas O'Connell 1997-
Billie Eilish (a.k.a. O'Connell) 2001-