Casimir
How to say it: KAZ-uh-meer · /ˈkæzəmɪr/
Proclaimer of peace; from Slavic 'kaziti-mir' - royal Polish name with long history.
Casimir was the 1,643rd most popular boys’ name in the United States in 2025, given to 73 babies (Social Security Administration). Its busiest decade was the 1910s, its births are up 2.0-fold in ten years, and it is projected to rise to #1,138 by 2030.
Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #1,643 |
|---|---|
| Babies born in 2025 | 73 |
| Share of births | 1 in 45,415 |
| Peak decade | 1910s |
| Change over 10 years | ×2.0 |
| Projected rank for 2030 (estimate) | #1,138 |
| In France, 2025 | #2,436 among boys’ names, 5 births |
Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.
Its life, decade by decade
Casimir peaked in the 1910s.
What goes with it
Parents who love Casimir also love
Nicknames
- Cas
- Caz
Honouring a Casimir in the family
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Casimir is about under 1 in 200.
Around the world
This spelling is used in English, French, German, Polish.
In France: #2,436 for boys in 2025.
Famous people named Casimir
- Casimir Funk (1884–1967)Polish-American biochemist
- Saint Casimir (1458–1484)Polish and Lithuanian prince
- Casimir Delavigne (1793–1843)French poet and dramatist
From Wikidata and Wikipedia
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