US Popularity Rank: 12179

Origin: Gaelic

Meaning: Vigilant, watchful

Casy is a gender-neutral name of Irish origin, inspired by the well-known name Casey, dropping the “e” to create a sweet and sharp title. Derived from the Gaelic surname Ó Cathasaigh, meaning “descendant of Cathasach,” Casy adopts the meanings “vigilant” and “watchful” for the baby who can’t take their eyes off you. Most popular in the 1990s, Casey and Casy carry those ultra-cool 90’s kid vibes that are so trendy these days.