Masculine dossier · first seen 1880
Leonidas
Stable
Cross-generational persistence
Peak era
2022
Peak births
760
Current vitality
Fragile
Peak generation
Gen Alpha
Quick answers about Leonidas
How many people are named Leonidas?
An estimated 9,619 living Americans are named Leonidas.
How rare is Leonidas?
Leonidas is moderately uncommon among babies today, with 591 boys receiving the name in 2025, down 22.2% from its 2022 peak.
How old is the typical Leonidas?
The median age of a living American named Leonidas is approximately 8 years, with most bearers falling between 4 and 12 years old.
Is Leonidas still popular?
Yes. Leonidas is holding steady, with 591 births in 2025 and a consistent recent baseline.
Where is Leonidas most common?
Leonidas has its strongest geographic signal in Colorado, where it appears 2.0× more often than the national baseline.
1880Peak 20222025
Peak year
2022
Decline from peak
22.2%
2025
591
All-time
10,281
Where it lives now
Leonidas is most concentrated in Colorado — about 2.0× the national rate in the 2020s. It also runs high in Washington.
States where Leonidas is given more often than the national average — its present-day heartland.