Kacy

♂ Boy

Pronounced KAY-see /ˈkeɪ.si/High

Meaning: A spelling of Casey — from the Irish surname O Cathasaigh, 'vigilant; watchful'; also read as the initials K + C; routes layeredLow

In 30 seconds: Vigilant; watchful: Kacy spells Casey. Crisp, modern, and warm.

💕 Browse more names

Origin LowIrish

MeaningA spelling of Casey — from the Irish surname O Cathasaigh, 'vigilant; watchful'; also read as the initials K + C; routes layered

U.S. rank (2024)#7990 ↘ Falling

2024 U.S. births10 boys (0.00% of U.S. boys)

Peak year1992

Total births (all-time)≈ 988

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

Kacy is a spelling of Casey — from the Irish surname O Cathasaigh, 'vigilant; watchful'; also read as the initials K + C (routes layered, which we note). A crisp, modern name (said 'KAY-see').

In the U.S. it appears as a spelling of Casey. Rare in this form, vigilant at the root, and modern.

Did you know? Casey comes from the Irish O Cathasaigh, 'vigilant; watchful' — Kacy is a spelling (also read as the initials K + C), crisp and modern (the routes are layered, which we note; said 'KAY-see').

Overall data confidence 34%

References — Casey — routes layered

Variations

CaseyKaseyKacey

Nicknames

—

Famous Bearers

Famous bearers coming soon.

If you like Kacy…

Casey— the standard spelling

Kasey— a kin spelling

Kacee— a companion spelling

Clancy— echoes that soft -cy sound

Darcy— a similarly popular pick

Explore names like Kacy

By themeuncertain irish

All themes →All meanings →All origins →

Frequently Asked

What does the name Kacy mean?

Kacy spells Casey — Irish 'vigilant; watchful'; 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 a boy's name here.

How popular is Kacy?

Kacy is a very rare name in the U.S.