Kacey
Meaning
variant of Casey, from Irish Cathassach, 'vigilant'
The story
Kacey is a variant of Casey, says Behind the Name, and Casey is the Irish surname Anglicized from Ó Cathasaigh, a patronymic from the given name Cathassach, "vigilant" in Irish; the surname entry adds that Casey can be given in honor of Casey Jones, the train engineer who died in 1900 saving his passengers. The K-spelling has run on both sides of the American ledger for sixty years: girls from about 1,037 in the 1970s to about 3,158 in the 1990s and about 1,223 so far this decade; boys in the hundreds for decades, now about 1,190 so far in this one. So far this decade the two lanes sit nearly even. A vigilant Irishman at the root, a folk-hero engineer on the line, and a spelling both sides now claim in nearly equal numbers.
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Kacey peaked in the 2010s and the 2020s in nearly equal measure.
When you meet Kacey
Most people given the name Kacey in the United States were born between 1980 and 2019. The Kacey you meet today is most often in her 20s or 30s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Kacey deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Kacey truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Kacey fits with your family’s names and surname.
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