Boy · Name family
Casimir
23,202births recorded
7Countries
5Variants
2025Peak · Poland
#46Poland 2025
Casimir is a boy name family recorded 23,202 times in 7 countries since 1881. It ranks highest today in Poland (#46 in 2025). Its all-time peak was in Poland in 2025, at 250.2 births per 100,000. Elsewhere it is mostly given as Kazimierz (Poland, England & Wales), Casimiro (Argentina), Kasimir (Germany (large cities)).
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
Which form wins where
Births per 100,000 newborns for each form, in the selected country.
All forms of Casimir
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Casimir | French | 7,225 | 🇫🇷 France | #6093 | 1931 | new |
| Casimir | French | 5,248 | 🇺🇸 United States | #2035 | 1919 | ▲ 139 % |
| Casimir | French | 54 | 🇩🇪 Germany (large cities) | – | 2020 | – |
| Casimir | French | 37 | 🇧🇪 Belgium | – | 2000 | – |
| Casimir | French | 16 | 🏴 England & Wales | – | 2024 | – |
| Kazimierz | Polish | 6,515 | 🇵🇱 Poland | #46 | 2025 | ▲ 323 % |
| Kazimierz | Polish | 82 | 🇺🇸 United States | – | 1915 | – |
| Kazimierz | Polish | 30 | 🇫🇷 France | – | 1924 | – |
| Kazimierz | Polish | 20 | 🏴 England & Wales | – | 2016 | – |
| Kazimierz | Polish | 5 | 🇦🇷 Argentina | – | 1958 | – |
| Casimiro | Spanish | 2,198 | 🇦🇷 Argentina | – | 1928 | – |
| Casimiro | Spanish | 1,084 | 🇺🇸 United States | #10695 | 1881 | new |
| Casimiro | Spanish | 30 | 🇫🇷 France | – | 1960 | – |
| Kazimir | English | 344 | 🇺🇸 United States | #3757 | 2024 | ▲ 295 % |
| Kazimir | English | 20 | 🇫🇷 France | – | 1935 | – |
| Kasimir | German | 184 | 🇩🇪 Germany (large cities) | – | 2019 | – |
| Kasimir | German | 80 | 🇺🇸 United States | #10695 | 1917 | new |
| Kasimir | German | 30 | 🇫🇷 France | – | 1924 | – |
How we grouped these names
- Casimir ↔ Kazimir — spelling variant
Questions about Casimir
How popular is the name Casimir?
In 2025 it ranked #46 in Poland. Official registers record 23,202 births across 7 countries.
What is Casimir in other languages?
Kazimierz (Polish); Casimiro (Spanish); Kazimir (English); Kasimir (German).
When was Casimir most popular?
It peaked in Poland in 2025, at 250.2 births per 100,000.
Is Casimir a boy or a girl name?
In official birth registers, Casimir is a boy name.