Thaddius
The boy's name Thaddius has been in the national records since 1916, with 593 births to its name. It has not appeared in the national data since 2023. About 530 Thaddiuses are alive in the United States today, and half of them are over 35.
Popularity, 1880–2025
boys named Thaddius
By the numbers
- Total US births
- 593
- Estimated living today
- 530
- Median age today
- 35
- Peak year
- 1989
- Best rank
- 3,205th
- Rank in 2025
- unranked
- First recorded
- 1916
How old the living Thaddiuses are
born that year still alive today
Of the 593 babies given the name since 1916, about 530 are alive — 89 in every hundred. The dotted line is the median: half were born before 1990 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.
Names of 1989
The most popular boys’ names the year Thaddius peaked:
Related names
Thaddius 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.