Holding steady, #14,942 for girls today.
Popularity of Kaisy since 1989
Babies named Kaisy per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1980s | 7 |
| 1990s | 18 |
| 2000s | 34 |
| 2010s | 44 |
| 2020s | 20 |
Meaning & origin
Kaisy is a rare modern name in the United States, first appearing in records in 1989. Its usage peaked in 2010, but it has since remained very uncommon; in 2025 it ranked 14,942, with only about 1 in 321,453 girls receiving the name. The name's trajectory has been stable at low frequency, and it has not appeared among top states. Kaisy likely originated as a creative spelling of the more familiar Casey, fitting a trend of names ending in the 'ee' sound. While its etymology is uncertain, its modern, invented character appeals to parents seeking a unique yet phonetically straightforward name.
Kaisy is a modern coinage that first appeared in U.S. records in 1989. It is likely a spelling variation of Casey (an Irish surname derived from Ó Cathasaigh, meaning 'descendant of Cathassach') or a diminutive form of the Scandinavian name Kaisa. However, no direct historical derivation can be confirmed, and it is best understood as a contemporary invented name.
Nicknames & variants
Nicknames: Kai, Kay
Sibling names for Kaisy
Names that share Kaisy's style, for a brother or sister.
