The name Cassidy comes from the Irish surname Ó Caiside meaning "descendant of Caiside".
The name Caiside itself means "curly-headed" in Gaelic.
Famous bearers
A bearer is Cassidy O'Reilly (born 1976), an American male wrestler.
Bearers of the surname include Jack Cassidy (1927 - 1976), an American actor;
Ted Cassidy (1932 - 1979), an American actor;
Eva Cassidy (1963 - 1996), an American singer;
Elaine Cassidy (born 1979), an Irish actress.
