Thaddeus
Boy name · #797 in 2025 · Rare
How old is the name Thaddeus? In official American birth records, Thaddeus has been tracked continuously since 1880, giving it 145 years of documented American history.
Thaddeus is currently the #797 boy name in the United States — 314 babies received it in 2025. A decade ago it stood at #703, so the name has been falling over the past ten years. Roughly one in every 5,732 boys born in 2025 was named Thaddeus.
Babies named Thaddeus per year. Source: Official national birth records.
The 145-year story
Thaddeus first appears in the Social Security records in 1880, when 12 boys received the name. Its peak came in 2016, when 416 boys were named Thaddeus — good for #638 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Thaddeus against up to 5 other names.
Uniqueness: will there be another Thaddeus in class?
On our rarity read — which blends how common Thaddeus is today with its five-year momentum — the name reads as "rare". A high score means genuine rarity — your Thaddeus will likely be the only one in the room, with the occasional spelling-out as the price.
Where Thaddeus is most common
Geography matters for names, and Thaddeus is no exception. Adjusted for how many boys are born in each state, Thaddeus is most common in CO (0.4 per 1,000), IN (0.4 per 1,000), PA (0.4 per 1,000), VA (0.3 per 1,000), OH (0.3 per 1,000) — against a national average of about 0.2 per 1,000 boys. These are per-capita rates, so they show where Thaddeus is a genuine regional favorite rather than just where the most babies are born.
Names like Thaddeus
Statistically, parents drawn to Thaddeus tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Marcellus, Santos, Tomas, Theophilus, and Jamison.
MarcellusSantosTomasTheophilusJamisonKendrickMosesAmadeus
Rank history (last 25 years)
| Year | Babies named Thaddeus | Rank |
|---|---|---|
| 2025 | 314 | #797 |
| 2024 | 285 | #852 |
| 2023 | 260 | #893 |
| 2022 | 309 | #808 |
| 2021 | 295 | #817 |
| 2020 | 297 | #783 |
| 2019 | 325 | #743 |
| 2018 | 344 | #703 |
| 2017 | 387 | #660 |
| 2016 | 416 | #638 |
| 2015 | 358 | #703 |
| 2014 | 328 | #730 |
| 2013 | 280 | #796 |
| 2012 | 231 | #898 |
| 2011 | 223 | #906 |
| 2010 | 198 | #994 |
| 2009 | 191 | #1020 |
| 2008 | 211 | #952 |
| 2007 | 228 | #883 |
| 2006 | 191 | #974 |
| 2005 | 192 | #917 |
| 2004 | 189 | #904 |
| 2003 | 183 | #909 |
| 2002 | 233 | #745 |
| 2001 | 214 | #788 |
Frequently asked questions
How old is the name Thaddeus?
In official American birth records, the name Thaddeus first appeared in 1880 (over 145 years ago), when 12 newborn boys received the name. It has over a century of continuous American history.
Is Thaddeus a popular boy name?
Thaddeus ranked #797 among boys in 2025 with 314 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #703.
When was the name Thaddeus most popular?
Thaddeus peaked in 2016, when 416 American boys received the name (ranked #638 that year). Since 2016 the name has declined from that high.
How rare is the name Thaddeus?
In 2025, roughly 1 in 5,732 newborn American boys was named Thaddeus. On our rarity scale (rarity blended with momentum) we classify it as "rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.