Kasi

♀ Girl

Pronounced KAY-see /ˈkeɪ.si/Medium

Meaning: Kasi is a spelling variant of Casey or Kacey, from the Irish Ó Cathasaigh, 'vigilant' or 'watchful.' It reads as a bright, casual short name.Low

In 30 seconds: A bright short name: Kasi is a form of Casey, 'vigilant' (said 'KAY-see'). Casual, breezy, and rare.

💕 Browse more names

Origin LowIrish, English

MeaningKasi is a spelling variant of Casey or Kacey, from the Irish Ó Cathasaigh, 'vigilant' or 'watchful.' It reads as a bright, casual short name.

U.S. rank (2024)#12737 ↘ Falling

2024 U.S. births7 girls (0.00% of U.S. girls)

Peak year1988

Total births (all-time)≈ 2,280

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

Kasi is a spelling of Casey or Kacey, from the Irish Ó Cathasaigh, 'vigilant.' It reads as a casual, modern short name, rare in the U.S. in this spelling (said 'KAY-see').

It appears only rarely for girls in the U.S. in this form. Rare, breezy, and casual.

Did you know? Kasi trims Casey down to a crisp four letters — an Irish-rooted name meaning 'vigilant,' with a light, breezy feel (said 'KAY-see').

Overall data confidence 46%

References — Kasi — form of Casey/Kacey, 'vigilant'

Variations

CaseyKaceyKacie

Nicknames

KasCee

Famous Bearers

Famous bearers coming soon.

If you like Kasi…

Casey— the base name Kasi respells

Macy— a like breezy short name

Lacey— a like casual -cy pick

Kaysi— echoes that soft -si sound

Keysi— shares the -si ending

Explore names like Kasi

By thememodern short irish casual

All themes →All meanings →All origins →

Frequently Asked

What does the name Kasi mean?

Kasi is a form of Casey or Kacey, from Irish roots meaning 'vigilant' or 'watchful.'

How do you pronounce Kasi?

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

Is Kasi a boy or girl name?

Kasi is used mostly for girls; Casey itself is unisex.

How popular is Kasi?

Kasi is a rare name for girls in the U.S. in this spelling.