Masculine dossier · first seen 1881
Casimiro
Stable
Cross-generational persistence
Peak era
1921
Peak births
28
Current vitality
Rare
Peak generation
Greatest Generation
Quick answers about Casimiro
How many people are named Casimiro?
An estimated 581 living Americans are named Casimiro.
How rare is Casimiro?
Casimiro is very rare among babies today, with 6 boys receiving the name in 2025, down 78.6% from its 1921 peak.
How old is the typical Casimiro?
The median age of a living American named Casimiro is approximately 46 years, with most bearers falling between 30 and 62 years old.
Is Casimiro still popular?
Yes. Casimiro is holding steady, with 6 births in 2025 and a consistent recent baseline.
Where is Casimiro most common?
Casimiro has its strongest geographic signal in Texas, where it appears 13.4× more often than the national baseline.
1881Peak 19212025
Peak year
1921
Decline from peak
78.6%
2025
6
All-time
1,084
Where it lives now
Casimiro is most concentrated in Texas — about 13.4× the national rate in the 1940s.
States where Casimiro is given more often than the national average — its present-day heartland.