Meaning Originally a surname meaning 'descendant of Cathasaigh' or 'of the vigilant one'. Origin of Kasie Celtic , Irish Popular Middle Names Sophia Pronunciation 🔊 Listen Kasie KAAS-iy Similar Names Kaycee Cassey Kaycie Kacie Kacy Kaci Masie Kaylaugh Cassidy Lydia Year by Year Popularity of Kasie