Watchful or alert
Kaysie is a modern phonetic spelling of the Irish surname Casey, derived from the Gaelic 'O Cathasaigh'. The name originally denoted a descendant of Cathasach, a personal name meaning 'vigilant' or 'watchful'. While it shares sounds with the initials 'K.C.', it is most often used as a friendly, contemporary feminine given name.
About 11 girls were named Kaysie in 2025.
Professional soccer player
US births per 5-year period, 1990–present (SSA data).
