Kaysi
- Gender
- Girl
- Say it
- KAY-see
- Origin
- Irish
- US rank, 2025
- #7,883 for girls
Kaysi is a girls' name of Irish origin, meaning “vigilant”. In 2025 it ranked 7,883rd for girls in the US (13 babies).
What does Kaysi mean?
Irish: spelling of Kaysie, itself a variant of Casey, from the surname O Cathasaigh
“vigilant”
A respelling of Casey, from the Irish surname O Cathasaigh, based on cathasach 'vigilant'.
Meaning borrowed from Kaysie.
Is Kaysi a girl's or a boy's name?
Kaysi is a girls' name. In 2025, it was given to 13 girls in the US. Too few boys were given it to be listed.
How popular is Kaysi in the US?
- Rank in 2025
- 7,883rd among girls
- Babies in 2025
- 13 about 1 in 120,000 girls
- Five-year trend
- Too rare to call too few babies to tell
- Same name in a class
- under 1% chance among 15 girls
In 2025, 13 girls in the US were named Kaysi, making it the 7,883rd most popular name for girls. Five years earlier, in 2020, it was 7,208th. Its busiest year was 1988, with 29 girls. It first appears in the records in 1971.
Half of all the girls named Kaysi in the US since 1880 were born between 1989 and 2011, the years shaded on the chart below.
In 2025, 1,196 girls in the US were given Kaysi or a name that sounds the same. With every name's spellings counted this way, that ranks #284, up from #7,883 for this spelling alone.
Kaysi in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2025 | 13 | #7,883 |
| 2024 | 8 | #11,117 |
| 2023 | 11 | #8,984 |
| 2022 | 10 | #9,674 |
| 2021 | 14 | #7,625 |
| 2020 | 15 | #7,208 |
| 2019 | 9 | #10,467 |
| 2018 | 5 | #15,677 |
| 2017 | 14 | #7,836 |
| 2016 | 15 | #7,599 |
| 2015 | 7 | #13,001 |
| 2014 | 10 | #10,124 |
| 2013 | 10 | #10,230 |
| 2012 | 9 | #11,251 |
| 2011 | 15 | #7,779 |
| 2010 | 8 | #12,270 |
| 2009 | 9 | #11,454 |
| 2008 | 5 | #17,498 |
| 2007 | 15 | #8,094 |
| 2006 | 6 | #15,147 |
| 2005 | 12 | #8,878 |
| 2004 | 13 | #8,254 |
| 2003 | 7 | #12,401 |
| 2002 | 15 | #7,039 |
| 2001 | 14 | #7,311 |
| 2000 | 19 | #5,700 |
| 1999 | 13 | #7,233 |
| 1998 | 16 | #6,068 |
| 1997 | 13 | #6,839 |
| 1996 | 13 | #6,718 |
| 1995 | 18 | #5,216 |
| 1994 | 10 | #8,116 |
| 1993 | 18 | #5,200 |
| 1992 | 18 | #5,260 |
| 1991 | 12 | #6,969 |
| 1990 | 17 | #5,281 |
| 1989 | 20 | #4,516 |
| 1988 | 29 | #3,301 |
| 1987 | 23 | #3,740 |
| 1986 | 12 | #5,754 |
| 1985 | 10 | #6,455 |
| 1984 | 18 | #4,165 |
| 1983 | 11 | #5,822 |
| 1982 | 10 | #6,369 |
| 1981 | 10 | #6,321 |
| 1980 | 7 | #8,177 |
| 1979 | 8 | #7,311 |
| 1978 | 0 | – |
| 1977 | 0 | – |
| 1976 | 0 | – |
| 1975 | 0 | – |
| 1974 | 6 | #7,678 |
| 1973 | 0 | – |
| 1972 | 0 | – |
| 1971 | 7 | #6,617 |
Nicknames for Kaysi
- Kay 3 girls in the UK in 2025
Names like Kaysi
Names given in the same years and the same naming tradition, with a similar sound.
Teagan, Kodi, Cassidy, Kennedy, Kaitlyn, Fallon, Reagan, Devyn, Codi, Kiara, Mckenna, Keegan
Other spellings of Kaysi
Casey, Kacey, Kaycee, Kacie, Kasey, Kaci, Kayce, Keisy, Kaycie, Keysi, Kayci
Names related to Kaysi
More Irish names
Oscar, Rowan, Rory, Maeve, Finn, Aiden, Ryan, Nolan, Quinn, Orla, Cody, Erin, Ronan, Connor, Declan, Callan
Sources
Figures from Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Kaysi: name meaning, origin and popularity”, https://www.nameling.co.uk/names/kaysi, updated 20 October 2026.