Cassidy
Cassidy: name meaning, origin and popularity
Pronunciation (IPA): /ˈkæsɪdi/ · /ˈkæsədi/
Meaning and origin of Cassidy
Root meaning: “descendant of Caiside”
- A male given name transferred from the surname.
- A female given name transferred from the surname, of modern American usage.
Etymology
From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”).
How popular is Cassidy?
Since 1880, 60,848 girls and 3,735 boys in the U.S. have been named Cassidy (94% girls). Its highest rank for girls was #99 in 1999. Its highest rank for boys was #665 in 1984. In 2025 it ranked #541 for girls, with 609 babies given the name.
Names similar to Cassidy
Names that start with the same letters, most popular first.
More Irish girl names
Sibling name ideas for Cassidy
Sister and brother names that share Cassidy's Irish roots and are still in the U.S. top 1,000.
Cassidy FAQ
What does the name Cassidy mean?
Cassidy traces back to a root meaning "descendant of Caiside". A male given name transferred from the surname. A female given name transferred from the surname, of modern American usage. From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”).
What is the origin of the name Cassidy?
Cassidy is listed as a name of Irish origin.
How popular is the name Cassidy?
Since 1880, 60,848 girls and 3,735 boys in the U.S. have been named Cassidy (94% girls). Its highest rank for girls was #99 in 1999. Its highest rank for boys was #665 in 1984. In 2025 it ranked #541 for girls, with 609 babies given the name.
Is Cassidy a boy or girl name?
Cassidy is mostly a girl name in the U.S.: 60,848 girls and 3,735 boys since 1880.
Popularity data: U.S. Social Security Administration baby name data, 1880–2025 (names given to 5+ babies per year). Origin and etymology text: Wiktionary, available under CC BY-SA 4.0.