FOR
REAL: Casey is an Irish surname. It's an anglicization of Ó Cathasaigh,
which means "descendadt of Cathasach" a personal name meaning either "noisy"
or "vigilant." It was used mostly for boys until the mid 20th century when it started becoming popular for girls as well.
diminutives: Case
other recorded spellings: Kacie, Kacey, Kaci, Kaycee, Kasie, Kayce, Kacy, Kaycie, Kasi, Kacee, Kayci, Casie, Cayce, Kc, Kaysie