Boys' name · peaked in 1918
Thaddeus name popularity since 1925
22,523 babies born in the US from 1925 to 2025 were named Thaddeus. Half of them were born in 1981 or earlier, so the typical Thaddeus is about 45 years old in 2026. Thaddeus peaked in 1918 as the #307 name for boys, and it ranked #798 in 2025.
Key facts
- US babies since 1925
- 22,523
- Named Thaddeus, 1925–2025
- Peak year
- 1918
- #307 for boys that year
- In 2025
- #798
- for boys in 2025 (314 babies)
- Girls / boys
- 99.9% boys
- 32 girls · 22,491 boys
- Most popular in
- Louisiana
- 2.77× its national share
Peak year is the year Thaddeus made up the largest share of US boys, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.
Thaddeus births per year, 1925–2025
The biggest year on this chart was 2016. Measured as a share of all babies, Thaddeus peaked earlier, in 1918.
- Steepest fall: Between 1979 and 1984, Thaddeus's share of baby boys fell by 46%, from 1 in 5,610 to 1 in 10,300.
- Fastest rise: Between 2011 and 2016, it became 1.9× more common, from 1 in 8,520 baby boys to 1 in 4,560.
Shaded on the chart. Both compare Thaddeus's share of all US boys five years apart, counting only years with at least 100 babies named Thaddeus.
Decade by decade
Babies named Thaddeus in each decade, and its rank among boys' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Girls | Boys | Rank |
|---|---|---|---|
| 1925–29 | 0 | 1,007 | – |
| 1930s | 6 | 1,214 | #613 |
| 1940s | 0 | 1,427 | #505 |
| 1950s | 0 | 2,192 | #499 |
| 1960s | 0 | 2,101 | #572 |
| 1970s | 16 | 2,890 | #505 |
| 1980s | 10 | 2,399 | #584 |
| 1990s | 0 | 2,361 | #759 |
| 2000s | 0 | 2,050 | #918 |
| 2010s | 0 | 3,090 | #705 |
| 2020–25 | 0 | 1,760 | #798 |
Ranks count every name given to at least 5 boys that year, so they can go past 1,000.
Generation fingerprint
18.6% of babies named Thaddeus from 1925 to 2025 were born in the Gen X years (1965–1980). The full split by generation:
Where Thaddeus is most popular
The index compares Thaddeus's share of babies in each state with its share nationwide, 1925–2025 (1.50× = 50% more common). States with at least 300 babies named Thaddeus.
| State | Index | Babies |
|---|---|---|
| Louisiana | 2.77× | 902 |
| Illinois | 1.81× | 1,598 |
| Michigan | 1.69× | 1,173 |
| South Carolina | 1.61× | 409 |
| Georgia | 1.52× | 761 |
Other spellings
Spellings that sound like Thaddeus and were given to at least 1,000 boys from 1925 to 2025, with the year each one was most popular.
| Spelling | Boys | Peak year |
|---|---|---|
| Thaddeus (this page) | 22,491 | 1918 |
| Thaddaeus | 1,039 | 2005 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Thaddeus's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Thaddeus.
Names from the same era
Other common names that peaked within two years of Thaddeus (1918).
Source: U.S. Social Security Administration national and state baby-name data, which covers names given to at least 5 babies of one sex in a year. About the data