Masculine dossier · first seen 1912
Thadeus
Stable
Cross-generational persistence
Peak era
1918
Peak births
27
Current vitality
Rare
Peak generation
Greatest Generation
Quick answers about Thadeus
How many people are named Thadeus?
An estimated 763 living Americans are named Thadeus.
How rare is Thadeus?
Thadeus is very rare among babies today, with 6 boys receiving the name in 2025, down 77.8% from its 1918 peak.
How old is the typical Thadeus?
The median age of a living American named Thadeus is approximately 33 years, with most bearers falling between 21 and 47 years old.
Is Thadeus still popular?
Yes. Thadeus is holding steady, with 6 births in 2025 and a consistent recent baseline.
1912Peak 19182025
Peak year
1918
Decline from peak
77.8%
2025
6
All-time
1,123