Compare two names
Thaddius and Thaddeus side by side: Thaddius peaked in 1989 and Thaddeus in 2016; in 2025 they were given to 0 and 314 babies.
Thaddius and Thaddeus, year by year
Girls and boys together; Thaddius solid, Thaddeus dashed.
| Thaddius | Thaddeus | |
|---|---|---|
| Births 2025 | 0 | 314 |
| Rank 2025 | not ranked | #798 among boys’ names |
| Recorded since 1880 | 593 | 26,089 |
| Peak year | 1989 | 2016 |
| Girls | 0% | 0.1% |
| Alive, estimated | 528 | 17,900 |
| Median age | 36 | 36 |
Both names: SSA national file, published May 8, 2026, and SSA’s cohort life tables.