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Home › Baby Names Directory › Kacy

Kacy

♀ Girl

Pronounced KAY-see /ˈkeɪ.si/High

Meaning: A -cy spelling of Casey — from the Irish Ó Cathasaigh, 'vigilant; watchful' (or 'brave in battle'); used for both sexes; here for girls; routes layeredLow

In 30 seconds: Vigilant; brave: Kacy spells Casey — 'vigilant; brave in battle'. Crisp, friendly, and warm. Used for both sexes (here for girls).
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Origin LowIrish, Gaelic
MeaningA -cy spelling of Casey — from the Irish Ó Cathasaigh, 'vigilant; watchful' (or 'brave in battle'); used for both sexes; here for girls; routes layered
U.S. rank (2025)#8594 ↘ Falling
2025 U.S. births12 girls (0.00% of U.S. girls)
Peak year1990
Total births (all-time)≈ 5,049

Popularity in the U.S. · SSA data

peak 199019562025

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

Kacy is a -cy spelling of Casey — from the Irish Ó Cathasaigh, 'descendant of Cathasach', meaning 'vigilant, watchful' (or 'brave in battle'; routes layered, which we note). A crisp, friendly, unisex name, here for girls (slug distinguished; also read as the initials K.C.; nickname Kace).

It registers thinly for girls in this spelling. Rare, vigilant-and-brave at the root, and friendly.

Did you know? Casey comes from the Irish Ó Cathasaigh, 'vigilant; watchful' (or 'brave in battle') — Kacy is a -cy spelling, crisp and friendly, used for both sexes (here for girls; the routes are layered, which we note).
Overall data confidence 55%
Behind the Name — Casey — routes layered

Variations

CaseyKaceyKasey

Nicknames

Kace

Famous Bearers

  • Famous bearers coming soon.

If you like Kacy…

Casey— the standard spelling
Kasey— a companion spelling
Macy— a sound-neighbor -acy girls' name
Kacey— a similarly popular pick
Kodi— another Irish name

Explore names like Kacy

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By meaningWarriorBrave / Courage

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Frequently Asked

What does the name Kacy mean?

Kacy spells Casey — Irish 'vigilant; watchful' or 'brave in battle'; the routes are layered.

How do you pronounce Kacy?

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

Is Kacy a boy or girl name?

Kacy is used for both sexes; this page covers its use as a girl's name.

How popular is Kacy?

Kacy is a rare name in the U.S.

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