Casy is a unique and uncommon given name of American origin. It is derived from the surname Casey, which is an Irish surname meaning "vigilant" or "watchful". The name Casy is typically used for boys, but it can also be used as a unisex name. Spelling variations of this name include Casey, Casie, and Kasey. There are no specific historical figures associated with the name Casy, making it a distinct choice for parents looking to give their child an original moniker.
The name Casy experienced a peak in popularity during the early to mid-1980s, with a total of 39 births recorded between 1982 and 1988. However, it appears that this name's usage has since declined, with only 47 births recorded from 1990 onwards, totalling 86 births overall across the span of thirty-two years.