Kayse \ka(y)-se\ as a girl's name is a variant of Casey (Irish, Gaelic), and the meaning of Kayse is "alert, watchful".

The baby name Kayse sounds like Kaysy, Kaysie, Kaysi, Kaysey, Kaysee, Kayce, Cayse and Kasse. Other similar baby names are Kayde, Kaye and Kayle.