Thadius
Thadius was last recorded in 2024, when 7 babies were given it; 511 Americans have been recorded with it between 1922 and 2024 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Thadius by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Thadius?
Unranked in 2025
Its last boys’ rank on record is #10,805, in 2024; SSA lists a name only in years with 5 or more births.
19 babies in 1974, the peak
Thadius peaked in 1974, when 19 boys were given it, #2,264 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2024 | 7 | #10,805 | 4.1 |
| 2020 | 5 | #13,838 | 2.9 |
| 2019 | 6 | #11,986 | 3.3 |
| 2018 | 6 | #11,985 | 3.3 |
| 2016 | 8 | #9,576 | 4.2 |
| 2015 | 7 | #10,507 | 3.7 |
| 2014 | 6 | #11,954 | 3.1 |
| 2013 | 8 | #9,566 | 4.2 |
| 2012 | 9 | #8,788 | 4.7 |
| 2011 | 5 | #14,126 | 2.6 |
Every recorded year (56)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2010 | 6 | #12,056 | 3.1 |
| 2009 | 7 | #10,847 | 3.5 |
| 2008 | 10 | #8,238 | 4.9 |
| 2007 | 6 | #12,197 | 2.9 |
| 2006 | 6 | #11,906 | 2.9 |
| 2005 | 8 | #9,002 | 4.0 |
| 2004 | 9 | #8,079 | 4.5 |
| 2003 | 8 | #8,548 | 4.0 |
| 2002 | 12 | #6,037 | 6.2 |
| 2001 | 9 | #7,450 | 4.6 |
| 2000 | 6 | #10,228 | 3.1 |
| 1999 | 7 | #8,616 | 3.6 |
| 1998 | 14 | #4,843 | 7.3 |
| 1997 | 12 | #5,249 | 6.4 |
| 1996 | 10 | #5,931 | 5.3 |
| 1995 | 11 | #5,461 | 5.8 |
| 1994 | 14 | #4,505 | 7.2 |
| 1993 | 11 | #5,314 | 5.6 |
| 1992 | 15 | #4,077 | 7.5 |
| 1991 | 14 | #4,197 | 6.9 |
| 1990 | 8 | #6,352 | 3.9 |
| 1989 | 9 | #5,551 | 4.5 |
| 1988 | 9 | #5,163 | 4.7 |
| 1987 | 13 | #3,700 | 7.0 |
| 1986 | 11 | #4,097 | 6.0 |
| 1985 | 10 | #4,302 | 5.4 |
| 1984 | 9 | #4,516 | 5.0 |
| 1982 | 10 | #4,203 | 5.5 |
| 1981 | 11 | #3,830 | 6.1 |
| 1980 | 7 | #5,467 | 3.9 |
| 1979 | 12 | #3,548 | 7.0 |
| 1978 | 7 | #5,002 | 4.3 |
| 1977 | 16 | #2,772 | 9.7 |
| 1976 | 9 | #3,983 | 5.7 |
| 1975 | 11 | #3,409 | 7.0 |
| 1974 | 19 | #2,264 | 12.1 |
| 1973 | 11 | #3,194 | 7.1 |
| 1972 | 17 | #2,317 | 10.5 |
| 1971 | 9 | #3,626 | 5.1 |
| 1970 | 7 | #4,192 | 3.8 |
| 1969 | 6 | #4,363 | 3.4 |
| 1968 | 7 | #3,640 | 4.0 |
| 1951 | 6 | #3,676 | 3.2 |
| 1924 | 5 | #4,888 | 4.4 |
| 1923 | 5 | #4,813 | 4.6 |
| 1922 | 5 | #4,886 | 4.6 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Thadius a boy’s or a girl’s name?
Thadius has been recorded only for boys: SSA lists no girls with the name in 56 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Thadius: the SSA national file counts each sex separately.
How many people are named Thadius, and how old are they?
An estimated 469 Americans named Thadius and born in the U.S. are alive in 2026 (92% of everyone recorded); the median is 34 years old and half are between 22 and 47. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 472 people named Thadius (3 women and girls, 469 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 466 born in the U.S. The Census count is 1% above that prediction.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 6 names spelled alike, given to 28,457 babies since 1880, Thadius is the fourth most given (1.8% of them). In 2025 none of their 320 babies recorded by SSA was a Thadius (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Thadius
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Thadius and names like it
- Compare Thadius and ThaddeusBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1970sThadius peaked in 1974.
- The top names of 1974The year the most babies were named Thadius.
- The names of the MillennialsMost people named Thadius alive today were born 1981-1996.
- Names starting with TMost given first.