Casimer
- US rank
- Unranked
- Syllables
- 3
- Peak
- #509 in 1917
0 babies were named Casimer in the US in 2025.
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US births per million boys, 1895–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Casimer you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryCasimer first shows up in US birth records in 1895, the first year at least 5 babies got it. It has been in use for 130 years since.
- Best yearIts best year was 1917, when it reached #509.
About the name Casimer
Casimer is a boy name of Slavic origin. It has 7 letters and 3 syllables, starting with C and ending in “-mer”. US birth records list Casimer for boys from 1895 to 2017, in 65 of those 123 years. Its best year was 1917, when it ranked #509 among boy names. It hasn't been given to 5 or more US babies in a year since 2017, so today it's a genuinely rare choice.
Origin:Slavic names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1890s | 23 | 43,066 boys |
| 1900s | 43 | 23,202 boys |
| 1910s | 110 | 9,071 boys |
| 1920s | 58 | 17,173 boys |
| 1930s | 15 | 66,890 boys |
| 1940s | 8.3 | 120,337 boys |
| 1950s | 4.4 | 226,757 boys |
| 1960s | 1.0 | 1,030,928 boys |
| 1970s | 0.4 | 2,500,000 boys |
| 1980s | 0.3 | 2,941,176 boys |
| 1990s | 0.3 | 3,225,806 boys |
| 2000s | 0.3 | 4,000,000 boys |
| 2010s | 0.3 | 2,962,963 boys |
More Slavic boy names
- Unisex name: Roman · of Rome
- Unisex name: Luka · man from Lucania
- Unisex name: Sincere · sincere
- Boy name: Zev · wolf
- Boy name: Lev · lion
- Boy name: Danilo · God is my judge
- Boy name: Niklaus · victory of the people
- Boy name: Yovani · God is gracious
Questions about the name Casimer
What is the origin of the name Casimer?
Casimer has Slavic roots in our records. Other Slavic names include Roman, Luka, Sincere.
Is Casimer a boy or girl name?
Casimer is a boy name.
How popular is the name Casimer?
Casimer is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2017. It peaked at #509 in 1917.