Masculine dossier · first seen 1894
Casimir
Resurgent
Gaining cultural share
Peak era
1919
Peak births
220
Current vitality
Rare
Peak generation
Greatest Generation
1894Peak 19192025
Quick answers about Casimir
How many people are named Casimir?
An estimated 1,701 living Americans are named Casimir.
How rare is Casimir?
Casimir is uncommon among babies today, with 73 boys receiving the name in 2025, down 66.8% from its 1919 peak.
How old is the typical Casimir?
The median age of a living American named Casimir is approximately 31 years, with most bearers falling between 10 and 68 years old.
Is Casimir still popular?
Yes — Casimir is currently rising in popularity, with 73 births in 2025. Births this decade are running about 1.6× higher than the previous decade.
Peak year
1919
Decline from peak
66.8%
2025
73
All-time
5,248