US Popularity Rank: 24579

Origin: Irish

Meaning: Vigilant, watchful; Pure; Shining upon man

Cassey is a form of Casey, an Irish personal and surname derived from cathasaigh, meaning “vigilant” and “watchful.” Cassey’s roots don’t end there, as the name can also be traced as a nickname for the Greek Cassandra, meaning “shining upon man,” and Catherine, meaning “pure.” Not as popular as its alternative Cassie, Cassey grants baby a dash of originality while staying ahead of the curve with its trendy “y” spelling. Ideal for the future-focused baby with an appreciation for antiquity, Cassey is one to keep on your radar.