Thaddeaus
- US rank
- Unranked
- Syllables
- 3
- Peak
- #3,857 in 1978
0 babies were named Thaddeaus in the US in 2025.
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US births per million boys, 1918–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Thaddeaus you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryThaddeaus first shows up in US birth records in 1918, the first year at least 5 babies got it. It has been in use for 107 years since.
- Best yearIts best year was 1978, when it reached #3,857.
About the name Thaddeaus
Thaddeaus is a boy name of Greek and Latin origin. It has 9 letters and 3 syllables, starting with T and ending in “-aus”. US birth records list Thaddeaus for boys from 1918 to 2010, in 21 of those 93 years. Its best year was 1978, when it ranked #3,857 among boy names. It hasn't been given to 5 or more US babies in a year since 2010, so today it's a genuinely rare choice.
Origin:Greek namesLatin names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1910s | 2.5 | 408,163 boys |
| 1920s | 0.4 | 2,272,727 boys |
| 1970s | 1.4 | 740,741 boys |
| 1980s | 1.7 | 584,795 boys |
| 1990s | 1.8 | 546,448 boys |
| 2000s | 1.7 | 602,410 boys |
| 2010s | 2.6 | 384,615 boys |
More Greek boy names
- Boy name: Theodore · gift of God
- Boy name: Mateo · gift of God
- Boy name: Lucas · man from Lucania
- Unisex name: Elias · my God is Yahweh
- Boy name: Sebastian · venerable
- Boy name: Leo · lion
- Boy name: Thomas · twin
- Unisex name: Miles · possibly gracious
Questions about the name Thaddeaus
What is the origin of the name Thaddeaus?
Thaddeaus has Greek, Latin roots in our records. Other Greek names include Theodore, Mateo, Lucas.
Is Thaddeaus a boy or girl name?
Thaddeaus is a boy name.
How popular is the name Thaddeaus?
Thaddeaus is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2010. It peaked at #3,857 in 1978.