Kaisy

♀ Girl

Pronounced KAY-zee /ˈkeɪ.zi/Medium

Meaning: A modern respelling that sits close to Kacey and Casey (from the Irish surname Ó Cathasaigh, 'vigilant'), reworked with the fashionable Kai-adjacent spelling. No single fixed source; routes uncertain.Low

In 30 seconds: A breezy modern respelling: Kaisy sits near Kacey and Casey (said 'KAY-zee'). Routes are uncertain, which we note.

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Origin LowAmerican

MeaningA modern respelling that sits close to Kacey and Casey (from the Irish surname Ó Cathasaigh, 'vigilant'), reworked with the fashionable Kai-adjacent spelling. No single fixed source; routes uncertain.

U.S. rank (2022)#10026 ↗ Rising

2022 U.S. births10 girls (0.00% of U.S. girls)

Peak year2010

Total births (all-time)≈ 118

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

Kaisy is a modern respelling near Kacey/Casey. Its route is uncertain, which we note. Breezy and rare in the U.S. (said 'KAY-zee').

It appears only rarely in 2025 U.S. birth data, at the deep tail of the list. Rare, breezy, and modern.

Did you know? Kaisy is a spelling that lands close to Kacey and Casey -- names that trace loosely to the Irish surname Ó Cathasaigh, 'vigilant' -- though as written here it reads as a modern coinage whose route is uncertain, which we note (said 'KAY-zee').

Overall data confidence 30%

References -- Kaisy — modern coinage/respelling near Kacey/Casey; routes uncertain

Variations

KaceyCaseyKaisey

Nicknames

KaiKaz

Famous Bearers

Famous bearers coming soon.

If you like Kaisy…

Casey— the root name it echoes

Maisie— a like breezy short pick

Daisy— a like short, cheerful name

Keissy— the same modern feel

Bassy— a fellow American choice

Explore names like Kaisy

By themeuncertain modern coinage short

All themes →All meanings →All origins →

Frequently Asked

What does the name Kaisy mean?

Kaisy is a modern respelling near Kacey and Casey; it has no single fixed source. The routes are uncertain, which we note.

How do you pronounce Kaisy?

It's said KAY-zee /ˈkeɪ.zi/ -- two syllables, stress on the first.

Is Kaisy a boy or girl name?

Kaisy is a girl's name.

How popular is Kaisy?

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