Thadeo
Boy name · #4130 in 2025 · Uniqueness 49/100
In 2025, 26 baby boys were named Thadeo, placing it at #4130 in the official national rankings. A decade ago it stood at #9568, so the name has been rising over the past ten years. Roughly one in every 69,231 boys born in 2025 was named Thadeo.
The 11-year story
Thadeo first appears in the Social Security records in 2014, when 5 boys received the name. Its all-time peak is essentially right now: 2025, with 26 babies and a rank of #4050. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. 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.
Babies named Thadeo per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Thadeo against up to 5 other names.
Uniqueness: will there be another Thadeo in class?
Thadeo scores 49 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Thadeo is most common
State-level data for Thadeo is sparse in 2025 — the name's footprint is too small for most states to report (the SSA suppresses counts under 5 per state for privacy).
Names like Thadeo
Statistically, parents drawn to Thadeo tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Mattheo, Amadeo, Jhayco, Kaido, and Truen.
MattheoAmadeoJhaycoKaidoTruenHarloTayoBento
Rank history (last 25 years)
| Year | Babies named Thadeo | Rank |
|---|---|---|
| 2025 | 26 | #4050 |
| 2024 | 20 | #4890 |
| 2023 | 19 | #5075 |
| 2022 | 12 | #6828 |
| 2021 | 11 | #7089 |
| 2020 | 8 | #8739 |
| 2019 | 12 | #6777 |
| 2016 | 6 | #10744 |
| 2015 | 7 | #9568 |
| 2014 | 5 | #12108 |
Frequently asked questions
Is Thadeo a popular boy name?
Thadeo ranked #4130 among boys in 2025 with 26 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #9568.
When was the name Thadeo most popular?
Thadeo peaked in 2025, when 26 American boys received the name (ranked #4050 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Thadeo?
In 2025, roughly 1 in 69,231 newborn American boys was named Thadeo. It scores 49/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.