Masculine dossier · first seen 1911
Cosimo
Resurgent
Gaining cultural share
Peak era
1927
Peak births
30
Current vitality
Rare
Peak generation
Greatest Generation
Quick answers about Cosimo
How many people are named Cosimo?
An estimated 480 living Americans are named Cosimo.
How rare is Cosimo?
Cosimo is very rare among babies today, with 16 boys receiving the name in 2025, down 46.7% from its 1927 peak.
How old is the typical Cosimo?
The median age of a living American named Cosimo is approximately 31 years, with most bearers falling between 9 and 58 years old.
Is Cosimo still popular?
Yes — Cosimo is currently rising in popularity, with 16 births in 2025. Births this decade are running about 2× higher than the previous decade.
Where is Cosimo most common?
Cosimo has its strongest geographic signal in New York, where it appears 4.7× more often than the national baseline.
1911Peak 19272025
Peak year
1927
Decline from peak
46.7%
2025
16
All-time
1,016
Where it lives now
Cosimo is most concentrated in New York — about 4.7× the national rate in the 1920s.
States where Cosimo is given more often than the national average — its present-day heartland.