US Popularity Rank: 11599

Origin: Irish

Meaning: Alert, watchful, vigilant

Kaycey is a feminine name with Irish roots. A fun respelling of Casey, this name comes from the Irish name Cathasaigh, meaning “alert,” “watchful,” or “vigilant.” With a name like Kaycey, your little one is sure to explore the world with a sharp, quizzical eye. The name Kaycey was at its most popular in 2001, giving it a vintage, Y2K aesthetic for baby to enjoy.