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Home › Baby Names Directory › Kassidee

Kassidee

♀ Girl

Pronounced KASS-ih-dee /ˈkæs.ɪ.diː/High

Meaning: Kassidee is a K-spelled, -ee-ended form of Cassidy, from the Irish surname Ó Caiside, 'descendant of Caiside' — a byname from cas, 'curly-haired'. Cassidy became a popular girls' surname name, and Kassidee is a softened, feminized version.Medium

In 30 seconds: Kassidee is a respelling of Cassidy, an Irish surname meaning 'descendant of Caiside' (said KASS-ih-dee). It rode the Cassidy wave, peaking in 2001.
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Origin MediumIrish
MeaningKassidee is a K-spelled, -ee-ended form of Cassidy, from the Irish surname Ó Caiside, 'descendant of Caiside' — a byname from cas, 'curly-haired'. Cassidy became a popular girls' surname name, and Kassidee is a softened, feminized version.
U.S. rank (2022)#11704 ↘ Falling
2022 U.S. births8 girls (0.00% of U.S. girls)
Peak year2001
Total births (all-time)≈ 657

Popularity in the U.S. · SSA data

peak 200419892022

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

Kassidee is a feminized respelling of Cassidy, an anglicized Irish surname from Ó Caiside, 'descendant of Caiside', where the byname Caiside derives from cas, 'curly-haired'. Cassidy crossed from surname to fashionable girls' name in the 1990s. Swapping C for K and ending in -ee, Kassidee softened the sturdy surname into something lighter and more overtly girlish.

The spelling appears in the U.S. record from the late 1980s and reached its small peak in 2001, during the Cassidy boom, before easing off. A Kassidee from that peak is still a young adult. It has always been rare against the standard Cassidy and Kassidy, but its clear Irish surname origin gives it real grounding.

Did you know? Cassidy jumped in popularity for girls in the 1990s, helped along by pop culture, and K-spellings with an -ee ending like Kassidee gave the Irish surname an extra-feminine finish.
Overall data confidence 55%
References — Kassidee — Variant of Cassidy, Irish Ó Caiside 'descendant of Caiside (curly-haired)'

Variations

CassidyKassidyCassideeKassaday

Nicknames

KassCassDee

Famous Bearers

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If you like Kassidee…

Cassidy— the standard spelling Kassidee restyles
Kassidy— a same-era K-spelled variant
Cassie— a related short form of the name
Cadence— a fellow rhythmic -ee/-ence girls' name

Explore names like Kassidee

By themeirishvariant2000s

All themes →All meanings →All origins →

Frequently Asked

What does the name Kassidee mean?

Kassidee is a respelling of Cassidy, from the Irish surname Ó Caiside, meaning 'descendant of the curly-haired one'.

How do you pronounce Kassidee?

It's said KASS-ih-dee /ˈkæs.ɪ.diː/ — three syllables, stress on the first.

Is Kassidee a boy or girl name?

Kassidee is used as a girl's name.

How popular is Kassidee?

Kassidee has always been rare in the U.S., a spelling variant of the popular Cassidy.

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