Cassidey \c(a)-ssi-dey\ as a boy's name (also used as girl's name Cassidey), is a variant of Cassidy (Irish, Welsh, Gaelic), and the meaning of Cassidey is "curly-headed; ingenious, clever".

The baby name Cassidey sounds like Cassedy, Cassady and Kassidy. Other similar baby names are Cassiel, Caide, Casey, Casshe, Cassian, Cassius and Cassio.