Thadeo is a very rare variant of Thad that has climbed to its highest level yet, peaking in 2025.
Thadeo is a boy name. In 2025 it ranked #4,129 for boy births in the United States (and #8,820 across all names), given to 26 babies. Thadeo first appears in 2014 and peaked in 2025 (26 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 26 | 26 | #4,129 |
| 2024 | 20 | 20 | #5,041 |
| 2023 | 19 | 19 | #5,229 |
| 2022 | 12 | 12 | #7,214 |
| 2021 | 11 | 11 | #7,524 |
| 2020 | 8 | 8 | #9,471 |
| 2019 | 12 | 12 | #7,129 |
| 2016 | 6 | 6 | #12,014 |
| 2015 | 7 | 7 | #10,512 |
| 2014 | 5 | 5 | #13,858 |