Namesakes
Siobhán McKenna
(f) 1923-1986 
Notable Actors and Entertainers (actor)
Siobhan Finneran
(f) 1966-
Notable Actors and Entertainers (actor)
Kelly Reilly
(a.k.a. Siobhán) (f) 1977-
Notable Actors and Entertainers (actor)
Siobhan Marshall
(f) 1983-
Notable Actors and Entertainers (actor)