Declining since 2014, #13,208 for girls today.
Popularity of Cassidee since 1981
Babies named Cassidee per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1980s | 54 |
| 1990s | 218 |
| 2000s | 248 |
| 2010s | 223 |
| 2020s | 40 |
Meaning & origin
Cassidee is a modern respelling of the Irish surname Cassidy, which originally denoted a descendant of Caiside, from the Irish word for 'curly-haired'. While Cassidy has enjoyed steady popularity since the 1970s, the Cassidee spelling first appeared in U.S. records in 1981 and reached its peak rank in 2014. In 2025, it stood at rank 13,208, fitting a broader trend of creative 'ee' endings for girls' names. The name has never appeared in the top 1,000, making it a distinctive choice that is both familiar and uncommon.
Cassidee is a modern respelling of Cassidy, an Anglicized form of the Irish surname Ó Caiside, meaning 'descendant of Caiside'. The personal name Caiside likely derives from the Irish word cas, meaning 'curly-haired'. Though traditionally a surname, Cassidy gained popularity as a given name in the late 20th century, and Cassidee emerged as a distinctive phonetic variant, particularly for girls.
Nicknames & variants
Nicknames: Cass, Cassie, Casey
Sibling names for Cassidee
Names that share Cassidee's style, for a brother or sister.
