Kayci

♀ Girl

Pronounced KAY-see /ˈkeɪ.si/High

Meaning: -ci spelling of Casey/Kacey — from the Irish surname O'Cathasaigh, 'vigilant, watchful'Medium

In 30 seconds: Vigilant and sweet: Kayci spells Casey — 'vigilant, watchful' — with a -ci. Crisp, friendly, and warm.

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Origin MediumIrish

Meaning-ci spelling of Casey/Kacey — from the Irish surname O'Cathasaigh, 'vigilant, watchful'

U.S. rank (2025)#6685 ↘ Falling

2025 U.S. births17 girls (0.00% of U.S. girls)

Peak year1990

Total births (all-time)≈ 1,653

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

Kayci is a -ci spelling of Casey/Kacey — from the Irish surname O'Cathasaigh, 'vigilant, watchful'. A crisp, friendly name, used for both sexes, here for girls; the Kay-/-ci styling personalizes it.

It registers thinly beside Casey. Rare, vigilant at the root, and friendly.

Did you know? Casey comes from the Irish O'Cathasaigh, 'vigilant, watchful' — Kayci is a sweet -ci spelling, used for both sexes; crisp and friendly.

Overall data confidence 68%

Behind the Name — Casey — root etymology

Variations

CaseyKaceyKaci

Nicknames

Kay

Famous Bearers

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If you like Kayci…

Casey— the standard spelling

Kaci— a companion spelling

Kasey— another spelling

Darci— a similarly popular pick

Keagan— another surname-name pick

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Frequently Asked

What does the name Kayci mean?

Kayci spells Casey — Irish 'vigilant, watchful'.

How do you pronounce Kayci?

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

Is Kayci a boy or girl name?

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

How popular is Kayci?

Kayci is a rare spelling in the U.S.; Casey is more common.