Watchful or vigilant
Casy is a variant of the Irish surname Casey, derived from the Gaelic 'O Cathasaigh'. It historically denotes a descendant of Cathasach, a personal name meaning 'vigilant' or 'watchful'. While rare as a first name, it carries a sense of alertness and heritage.
Less common today
Casy isn't in the latest US Top 1000. It last peaked at #5,331 in 1995.
US births per 5-year period, 1990–present (SSA data).
The former preacher and labor activist · The Grapes of Wrath
