as a First Name
Transferred use of the Anglicized form of the Irish surname Ó Caiside. Its use as a girl's name may be due to the -y ending, coupled with the fact that it could be taken as an expanded form of Cass (a medieval and modern short form of Cassandra).
| 2,165th in the U.S. for 2011 |
Nicknames & variations
Quick facts
- Thousands
- of people in the U.S have this name
- 9,338
- to be exact (as of February 2011)
- 46,911
- if you include dead people (since the government started keeping track)
- Utah
- has the most people named Cassidy per capita
- 1999
- marked the height of its popularity
98%
2%
0%
55+
55+
1%
30-54
30-54
17%
13-29
13-29
82%
0-12
0-12
Top state populations
U.S. Distribution Map