Thaddius
- US rank
- Unranked
- Syllables
- 2
- Peak
- #2,243 in 1972
0 babies were named Thaddius in the US in 2025.
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US births per million boys, 1916–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Thaddius you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryThaddius first shows up in US birth records in 1916, the first year at least 5 babies got it. It has been in use for 109 years since.
- Best yearIts best year was 1972, when it reached #2,243.
About the name Thaddius
Thaddius is a boy name of Greek and Latin origin. It has 8 letters and 2 syllables, starting with T and ending in “-ius”. US birth records list Thaddius for boys from 1916 to 2023, in 64 of those 108 years. Its best year was 1972, when it ranked #2,243 among boy names. It hasn't been given to 5 or more US babies in a year since 2023, so today it's a genuinely rare choice.
Origin:Greek namesLatin names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1910s | 3.3 | 303,030 boys |
| 1920s | 0.5 | 2,173,913 boys |
| 1930s | 0.5 | 2,222,222 boys |
| 1940s | 0.8 | 1,219,512 boys |
| 1950s | 1.1 | 900,901 boys |
| 1960s | 1.9 | 512,821 boys |
| 1970s | 6.8 | 147,710 boys |
| 1980s | 6.3 | 160,000 boys |
| 1990s | 5.4 | 186,220 boys |
| 2000s | 4.6 | 216,450 boys |
| 2010s | 3.1 | 326,797 boys |
| 2020s | 2.6 | 384,615 boys |
Other spellings of Thaddius
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 Thaddius
What is the origin of the name Thaddius?
Thaddius has Greek, Latin roots in our records. Other Greek names include Theodore, Mateo, Lucas.
Is Thaddius a boy or girl name?
Thaddius is a boy name.
How popular is the name Thaddius?
Thaddius is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2023. It peaked at #2,243 in 1972.