Holding steady.
Popularity of Casidy since 1980
Babies named Casidy per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1980s | 34 |
| 1990s | 116 |
| 2000s | 145 |
| 2010s | 52 |
| 2020s | 0 |
Meaning & origin
Casidy is a modern respelling of Cassidy, an Irish surname turned given name. While the spelling Cassidy has been in use since at least 1980, Casidy peaked in popularity in 2001 according to Social Security data. Its trajectory has remained relatively stable since that peak, though it is far less common than the standard spelling. The name carries the Irish heritage of 'curly-haired', and its melodic sound fits well with other surname-style names popular in recent decades. Parents choosing Casidy often seek a unique twist on a familiar name.
Casidy is a respelling of Cassidy, which comes from the Irish surname Ó Caiside, meaning 'descendant of Caiside'. The personal name Caiside is derived from the Gaelic word 'cais' meaning 'curly' or 'curly-haired'. The surname was historically associated with County Fermanagh in Ireland. As a given name, Cassidy gained popularity in the United States during the late 20th century, and Casidy emerged as a less common phonetic variant.
Nicknames & variants
Nicknames: Cass, Cassie, Sid
Sibling names for Casidy
Names that share Casidy's style, for a brother or sister.
