Thadeus Boy
How popular is Thadeus?
#10,691 boy name in 2025
6 baby boys were named Thadeus in the US in 2025, making it the 10691st most popular boy name.
773living people named Thadeus (est.)
33median age of people named Thadeus
1,123babies named Thadeus since 1880
1 in 552,557US babies born in 2025
Thadeus popularity over time
| Rank in 2025 | #10,691 for boys (▲ 242 from 2024) |
|---|---|
| Babies in 2025 | 6 boys |
| 10-year trend | Falling (-33% babies vs 2015) |
| Earlier ranks | #8,035 in 2015 |
| Peak year | 1918 (27 boys) |
| Highest rank | #1,372 in 1918 |
| First recorded | 1912 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Thadeus 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.
Thadeus by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1910s | 116 | #1,372 |
| 1920s | 153 | #1,643 |
| 1930s | 27 | #2,779 |
| 1940s | 26 | #3,315 |
| 1950s | 33 | #2,661 |
| 1960s | 48 | #2,626 |
| 1970s | 148 | #1,680 |
| 1980s | 121 | #2,463 |
| 1990s | 160 | #2,691 |
| 2000s | 173 | #3,789 |
| 2010s | 95 | #5,993 |
| 2020s | 23 | #10,691 |
Boy names about as popular as Thadeus
Questions
- Is Thadeus a boy or girl name?
- Thadeus is mostly a boy name. Over the last 10 years, 100% of babies named Thadeus were boys.
- How popular is the name Thadeus?
- 6 baby boys were named Thadeus in the US in 2025, making it the 10691st most popular boy name.
- When was Thadeus most popular?
- Thadeus peaked in 1918, when 27 boys were given the name. Its highest rank was #1,372 in 1918.
- How many people are named Thadeus?
- 1,123 babies have been named Thadeus in the US since 1880. We estimate about 773 of them are alive in 2026, with a median age of 33.
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.