Masculine dossier · first seen 1881
Isidore
Resurgent
Gaining cultural share
Peak era
1919
Peak births
183
Current vitality
Rare
Peak generation
Greatest Generation
Quick answers about Isidore
How many people are named Isidore?
An estimated 630 living Americans are named Isidore.
How rare is Isidore?
Isidore is very rare among babies today, with 31 boys receiving the name in 2025, down 83.1% from its 1919 peak.
How old is the typical Isidore?
The median age of a living American named Isidore is approximately 21 years, with most bearers falling between 7 and 64 years old.
Is Isidore still popular?
Yes — Isidore is currently rising in popularity, with 31 births in 2025. Births this decade are running about 2.6× higher than the previous decade.
Where is Isidore most common?
Isidore has its strongest geographic signal in New York, where it appears 8.7× more often than the national baseline.
1881Peak 19192025
Peak year
1919
Decline from peak
83.1%
2025
31
All-time
3,421