Thaddaeus
- US rank
- #7,679
- Syllables
- 3
- Peak
- #2,205 in 1978
10 babies were named Thaddaeus in the US in 2025. It has dropped 3,139 places in five years.
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US births per million boys, 1924–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Thaddaeus you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 169,492 baby boys born in the US in 2025 was named Thaddaeus, 10 babies in all. In a typical school of 500 kids, your Thaddaeus would very likely be the only one.
- HistoryThaddaeus first shows up in US birth records in 1924, the first year at least 5 babies got it. It has been in use for 101 years since.
- Best yearIt was far more popular in 1978, when it ranked #2,205. Today it's #7,679, so it could be due a comeback.
- TrendThaddaeus has slipped 3,139 places over the last five years and now sits at #7,679. Good news if you want a familiar name that fewer kids will share.
About the name Thaddaeus
Thaddaeus is a boy name of Greek and Latin origin. It has 9 letters and 3 syllables, starting with T and ending in “-eus”. US birth records list Thaddaeus for boys from 1924 to 2025, in 59 of those 102 years. Its best year was 1978, when it ranked #2,205 among boy names. In 2025 it ranked #7,679, with 10 babies.
Origin:Greek namesLatin names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1920s | 0.9 | 1,132,075 boys |
| 1940s | 0.3 | 2,941,176 boys |
| 1960s | 0.4 | 2,564,103 boys |
| 1970s | 7.7 | 129,870 boys |
| 1980s | 9.5 | 105,152 boys |
| 1990s | 10 | 96,712 boys |
| 2000s | 11 | 88,574 boys |
| 2010s | 11 | 93,284 boys |
| 2020s | 9.3 | 107,720 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 Thaddaeus
What is the origin of the name Thaddaeus?
Thaddaeus has Greek, Latin roots in our records. Other Greek names include Theodore, Mateo, Lucas.
Is Thaddaeus a boy or girl name?
Thaddaeus is a boy name.
How popular is the name Thaddaeus?
Thaddaeus ranked #7,679 for US boys in 2025, given to 10 babies. Its best year was 1978 (#2,205).