Casimiro
How to say it: kah-see-MEE-roh · /kɑsiˈmiroʊ/
Spanish and Portuguese form of Casimir, from Slavic 'proclaimer of peace' - historic royal name.
Casimiro was the 9,794th most popular boys’ name in the United States in 2025, given to 6 babies (Social Security Administration). Its busiest decade was the 1920s, its births are up 2.2-fold in ten years, and it is projected to slip to #10,873 by 2030.
Updated · SSA 2025 data, published May 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #9,794 |
|---|---|
| Babies born in 2025 | 6 |
| Share of births | 1 in 552,557 |
| Peak decade | 1920s |
| Change over 10 years | ×2.2 |
| Projected rank for 2030 (estimate) | #10,873 |
Sources: Social Security Administration (SSA). How we compute these figures.
Its life, decade by decade
Casimiro peaked in the 1920s.
What goes with it
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Casimiro is about under 1 in 200.
Around the world
This spelling is used in English, Italian, Portuguese, Spanish.
Famous people named Casimiro
- Casimiro Torres (1905–1977)Chilean footballer
- Casimiro de Abreu (1839–1860)Brazilian poet, novelist and playwright
- Casimiro Gennari (1839–1914)Catholic cardinal
From Wikidata and Wikipedia
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