Kacey

♂ Boy

Pronounced KAY-see /ˈkeɪ.si/High

Meaning: Vigilant, watchful; a K-spelling variant of Casey, from Irish Gaelic Cathasach (watchful, vigilant)High

In 30 seconds: A K-spelling of Casey meaning 'vigilant' in Irish Gaelic. In boys' data it coexists alongside the more common male Kasey and Casey spellings — a name equally comfortable for boys and girls.

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Origin HighIrish

MeaningVigilant, watchful; a K-spelling variant of Casey, from Irish Gaelic Cathasach (watchful, vigilant)

U.S. rank (2025)#1155 ↘ Falling

2025 U.S. births182 boys (0.01% of U.S. boys)

Peak year2021

Total births (all-time)≈ 3,301

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Kacey is a K-spelling variant of Casey (Irish Gaelic Cathasach: vigilant, watchful). See also Kacey (female entry) and Casey entries.

Kacey ranked #1043 for boys in 2024.

Did you know? The various spellings of Casey/Kacey/Kasey together represent one of the most spelling-fragmented names in American naming — with the SSA counting each spelling separately, giving parents an almost endless palette of phonetically identical name options.

Overall data confidence 87%

Behind the Name — Casey — Irish Gaelic etymologyU.S. Social Security Administration — popularity data

Variations

CaseyKaseyKacy

Nicknames

Kace

Famous Bearers

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If you like Kacey…

Casey— the standard C-spelling of the same Irish name

Kasey— the Ka- variant of the same name

Corey— two-syllable -ey ending name from the same era

Stacey— two-syllable -ey ending name in the same cohort

Explore names like Kacey

By themeunisex two-syllable irish variant-spelling k-spelling

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Frequently Asked

What does the name Kacey mean?

Kacey means 'vigilant,' a K-spelling variant of Casey, from Irish Gaelic Cathasach (watchful).

How do you pronounce Kacey?

It's said KAY-see — two syllables, stress on the first.

Is Kacey a boy or girl name?

Kacey is used for both sexes.

How popular is Kacey?

Kacey ranked #1043 for U.S. boys in 2024.