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Home › Baby Names Directory › Kassidy

Kassidy

♀ Girl

Pronounced KAS-ih-dee /ˈkæs.ɪ.di/High

Meaning: Curly-haired; or descendant of Caiside; an American respelling of the Irish surname CassidyHigh

In 30 seconds: An American respelling of Cassidy, the Irish surname meaning 'curly-haired' or 'descendant of Caiside.' The K spelling is a popular variant of the original C, favored by parents who want a distinctive twist.
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Origin HighIrish
MeaningCurly-haired; or descendant of Caiside; an American respelling of the Irish surname Cassidy
U.S. rank (2025)#1039 ↘ Falling
2025 U.S. births240 girls (0.01% of U.S. girls)
Peak year2000
Total births (all-time)≈ 21,037

Popularity in the U.S. · SSA data

peak 200019752025

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

Kassidy is a spelling variant of Cassidy, the anglicization of the Irish surname O'Caiside, meaning 'descendant of Caiside.' Caiside itself is believed to derive from a word meaning curly-haired. The name was a boys' surname before becoming a girls' given name in the United States in the 1980s.

Cassidy rose into the U.S. top 100 for girls in the 1990s and has declined since. Kassidy is one of several K-spelling variants. It ranked #978 for girls in 2024.

Did you know? Cassidy — and by extension Kassidy — was popularized as a given name partly through the song Cassidy by the Grateful Dead (1972), written by John Barlow about a newborn named Cassidy Law.
Overall data confidence 87%
Behind the Name — Cassidy — Irish etymologyU.S. Social Security Administration — popularity data

Variations

CassidyKasidyCassidee

Nicknames

CassKassKassKassie

Famous Bearers

  • ★Kassidy Cook (b. 1995)
    American Olympic springboard diver from The Woodlands, Texas, who represented the United States at the 2016 Rio de Janeiro Games and won a silver medal in the women's synchronized 3-meter springboard at the 2024 Paris Olympics alongside partner Sarah Bacon. A Stanford University graduate and two-time Olympian, Cook is one of the most prominent athletes to carry the name Kassidy.

If you like Kassidy…

Cassidy— the standard spelling of the same Irish name
Kennedy— Irish surname name popular for girls in the same era
Kenzie— short form of McKenzie with the same Irish surname feel
Kelsey— Irish surname name popular for girls since the 1980s

Explore names like Kassidy

By themesurname-nameirishvariant-spellingk-spelling

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Frequently Asked

What does the name Kassidy mean?

Kassidy means 'curly-haired' or 'descendant of Caiside,' as a K-spelling variant of the Irish surname Cassidy.

How do you pronounce Kassidy?

It's said KAS-ih-dee — three syllables, stress on the first.

Is Kassidy a boy or girl name?

Kassidy is used as a girls' name in the U.S.

How popular is Kassidy?

Kassidy ranked #978 for U.S. girls in 2024.

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