Thadeus
Thadeus is a boy's name that peaked in 1918, when it was the 1,373rd most popular in the United States. In 2025 it ranked 10,695th. About 770 Thadeuses are alive in the United States today, and half of them are over 32.
Popularity, 1880–2025
boys named Thadeus
By the numbers
- Total US births
- 1,123
- Estimated living today
- 770
- Median age today
- 32
- Peak year
- 1918
- Best rank
- 1,373rd
- Rank in 2025
- 10,695th
- First recorded
- 1912
How old the living Thadeuses are
born that year still alive today
Of the 1,123 babies given the name since 1912, about 770 are alive — 68 in every hundred. The dotted line is the median: half were born before 1993 and half after.
An estimate, not a count. SSA births aged forward through SSA cohort life tables, which know nothing about who left the country or arrived in it — so for a name that mostly came to America rather than being born in it, this is a floor rather than a figure. Where you fall among living Americans.
Where Thadeus is most common
Total births recorded in each state since 1910. Browse names by state.
Names of 1918
The most popular boys’ names the year Thadeus peaked:
Thadeus elsewhere
| Country | Spelling | Births | Best rank |
|---|---|---|---|
| France boys | Thadeus | 30 | 6,365th |
Counts come from each country's own records and are not comparable with the US figures above, which cover different years and a different definition of a recorded name. Where a country writes the name several ways, the spellings are added together and the most common is shown. A row marked name registrations is counting something else: Portugal ranks each of a child's two given names separately, so a girl registered Maria Leonor is in both the Maria row and the Leonor row, and that figure is not a number of children.
Thadeus by city
| City | Years | Births | Best rank |
|---|---|---|---|
| Berlin boys | 2017–2023 | 2 | 593rd |
One city over a few years, so these are much smaller numbers than the national ones above and not comparable with them.
Related names
Thadeus against another name
Two names on one chart, with the year one overtook the other.
Try it on yourself
Source: US Social Security Administration, national and state baby-name files, 1880–2025. Counts include only births registered with the SSA, and names with fewer than five births in a year are not published. The living estimate applies SSA cohort life tables to those births; it counts people born in the United States, so it misses anyone who arrived later and anyone who has left.