Thaddeus Boy
How popular is Thaddeus?
#797 boy name in 2025
314 baby boys were named Thaddeus in the US in 2025, making it the 797th most popular boy name.
Thaddeus popularity over time
Boys Girls
| Rank in 2025 | #797 for boys (▲ 55 from 2024) |
|---|---|
| Babies in 2025 | 314 boys |
| 10-year trend | Steady (-12% babies vs 2015) |
| Earlier ranks | #703 in 2015, #783 in 2020 |
| Peak year | 2016 (416 boys) |
| Highest rank | #307 in 1918 |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.2% in a class of 25 kids born in 2025 |
Thaddeus counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Thaddeus family of names ranked #742 for boys in 2025 (#796 the year before), with 320 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Thaddeus | 314 | 98% |
| Thadeus | 6 | 2% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Thaddeus is most popular
Babies named Thaddeus per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
Thaddeus by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 111 | #498 |
| 1890s | 93 | #424 |
| 1900s | 155 | #462 |
| 1910s | 1,793 | #307 |
| 1920s | 2,421 | #337 |
| 1930s | 1,214 | #449 |
| 1940s | 1,427 | #499 |
| 1950s | 2,192 | #450 |
| 1960s | 2,101 | #495 |
| 1970s | 2,890 | #416 |
| 1980s | 2,399 | #526 |
| 1990s | 2,361 | #578 |
| 2000s | 2,050 | #745 |
| 2010s | 3,090 | #638 |
| 2020s | 1,760 | #783 |
Boy names about as popular as Thaddeus
Questions
- Is Thaddeus a boy or girl name?
- Thaddeus is mostly a boy name. Over the last 10 years, 100% of babies named Thaddeus were boys.
- How popular is the name Thaddeus?
- 314 baby boys were named Thaddeus in the US in 2025, making it the 797th most popular boy name.
- When was Thaddeus most popular?
- Thaddeus peaked in 2016, when 416 boys were given the name. Its highest rank was #307 in 1918.
- How many people are named Thaddeus?
- 26,089 babies have been named Thaddeus in the US since 1880. We estimate about 18,226 of them are alive in 2026, with a median age of 36.
- Where is Thaddeus most popular?
- From 2021 to 2025, Thaddeus was most common in Kansas, at 0.4 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.