Notable Actors and Entertainers: 2 actors
Maureen O'Sullivan   1911-1998  
Moya O'Sullivan   1926-2018  
Notable Athletes: 1 billiards
(billiards) Ronnie O'Sullivan   1975-  
Olympic Medalists: 1 bronze, 1 silver
(bronze) Keala O'Sullivan   1968   diving  
(silver) Sonia O'Sullivan   2000   5000 m