Thadius
- US rank
- Unranked
- Syllables
- 2
- Peak
- #2,199 in 1974
0 babies were named Thadius in the US in 2025.
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US births per million boys, 1922–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Thadius you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryThadius first shows up in US birth records in 1922, the first year at least 5 babies got it. It has been in use for 103 years since.
- Best yearIts best year was 1974, when it reached #2,199.
About the name Thadius
Thadius is a boy name of Greek and Latin origin. It has 7 letters and 2 syllables, starting with T and ending in “-ius”. US birth records list Thadius for boys from 1922 to 2024, in 56 of those 103 years. Its best year was 1974, when it ranked #2,199 among boy names. It hasn't been given to 5 or more US babies in a year since 2024, so today it's a genuinely rare choice.
Origin:Greek namesLatin names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1920s | 1.7 | 588,235 boys |
| 1950s | 0.3 | 3,125,000 boys |
| 1960s | 0.7 | 1,351,351 boys |
| 1970s | 7.2 | 138,313 boys |
| 1980s | 4.8 | 207,900 boys |
| 1990s | 5.9 | 168,067 boys |
| 2000s | 4.1 | 246,305 boys |
| 2010s | 3.2 | 310,559 boys |
| 2020s | 1.4 | 714,286 boys |
Other spellings of Thadius
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 Thadius
What is the origin of the name Thadius?
Thadius has Greek, Latin roots in our records. Other Greek names include Theodore, Mateo, Lucas.
Is Thadius a boy or girl name?
Thadius is a boy name.
How popular is the name Thadius?
Thadius is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2024. It peaked at #2,199 in 1974.