Cassiddy \c(as)-siddy, cass(id)-dy\ as a girl's name is a variant of Cassidy (Irish, Gaelic), and the meaning of Cassiddy is "curly-headed".

The baby name Cassiddy sounds like Cassidey, Kassidy, Cassity, Cassidie, Cassidi, Cassidee, Casseday, Cassady and Casidy. Other similar baby names are Cassilda and Chassidy.