An uncommon Polish pick — distinctive and rare.
a diminutive of the male given name Kasimir, from Polish
Kasi is a boy's and girl's baby name of Polish origin, a diminutive of Kazimierz (Casimir), meaning 'famous destroyer' or more poetically 'he who destroys enemies through fame' — from the Slavic kazi (to destroy) and miru (world, peace).
Casimir was a beloved Polish saint and royal name. In its diminutive form, Kasi has an easy, friendly energy that gives the historic Polish name a much more approachable everyday form.
Kasi was #7611 twenty years ago and has since drifted to #12737, but its charm endures.
| Decade | Births | Trend |
|---|---|---|
| 2020s | 24 | ▼ |
| 2010s | 93 | ▼ |
| 2000s | 220 | ▼ |
| 1990s | 632 | ▼ |
| 1980s | 911 | ▲ |
| 1970s | 352 | ▲ |
| 1960s | 48 | — |
| Year | Births | Rank |
|---|---|---|
| 2024 | 7 | #12737 |
| 2021 | 11 | #9245 |
| 2020 | 6 | #14253 |
| 2019 | 9 | #10897 |
| 2018 | 11 | #9466 |
| 2017 | 7 | #13379 |
| 2016 | 6 | #15258 |
| 2015 | 8 | #12397 |
| 2014 | 8 | #12490 |
| 2013 | 12 | #9310 |
| 2012 | 6 | #15907 |
| 2011 | 11 | #10062 |
| 2010 | 15 | #8083 |
| 2009 | 10 | #11071 |
| 2008 | 17 | #7573 |
| 2007 | 11 | #10468 |
| 2006 | 21 | #6243 |
| 2005 | 26 | #5028 |
| 2004 | 15 | #7611 |
| 2003 | 18 | #6442 |
Source: U.S. Social Security Administration. Showing years with 5+ recorded births.
While overwhelmingly a girl's name, Kasi has also been given to 53 boys in the U.S. since 1990.
Last updated May 2026 · Data: U.S. Social Security Administration (1962–2024) · Methodology