Casie \c(a)-sie\ as a girl's name is a variant of Casey (Irish, Gaelic) and Cassandra (Greek), and the meaning of Casie is "alert, watchful; man's defender, warrior".

The baby name Casie sounds like Cassie, Casia, Cacie, Kasie, Caysie, Casse, Casi, Casee and Caisie. Other similar baby names are Cadie, Calie, Carie, Catie and Dasie.