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Cassidie
How to Pronounce Cassidie
Pronounced KAS-uh-dee /ˈkæs.ə.di/High
Meaning: Cassidie is a respelling of Cassidy, an Irish surname from O Caiside, 'descendant of Caiside', a byname connected to the word for curly hair. Cassidy became a popular unisex and then largely girls' given name; Cassidie swaps the final -y for -ie, a common feminizing touch, without changing the sound.Low
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
Cassidie is one of several respellings of Cassidy, an Irish surname from O Caiside, meaning 'descendant of Caiside'. The byname Caiside is connected to the Irish word for curly or ringleted hair. Cassidy passed from surname to given name in the twentieth century, becoming especially popular for girls in the 1980s and '90s, and spellings like Cassidie traded the -y for a softer -ie ending in that era's fashion.
Cassidie stayed uncommon, with only a few dozen girls a year receiving this spelling around a high point in the late 1990s. A girl named Cassidie then would be in her late twenties today. Its meaning comes from Cassidy and the Irish byname behind it; it reads as a soft respelling within the large Cassidy family rather than a distinct name.
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Frequently Asked
What does the name Cassidie mean?
Cassidie is a respelled form of Cassidy, an Irish surname meaning 'descendant of Caiside', linked to 'curly-haired'.
How do you pronounce Cassidie?
It is said KAS-uh-dee /ˈkæs.ə.di/ - three syllables, stress on the first.
Is Cassidie a boy or girl name?
Cassidie is used as a girl's name.
How popular is Cassidie?
Cassidie has always been uncommon, a soft respelling of the more familiar Cassidy.