Thadeus
Thadeus was given to 6 boys in 2025, #11,841 among boys’ names; 1,123 Americans have been recorded with it since 1912 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Thadeus by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Thadeus?
#11,841 among boys’ names, 2025
Thadeus fell from #8,665 in 2015 to #11,841 in 2025 among boys’ names; its share of boys born fell from 4.7 to 3.5 per million.
27 babies in 1918, the peak
Thadeus peaked in 1918, when 27 boys were given it, #1,397 among boys’ names. The 6 births of 2025 are 22% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 6 | #11,841 | 3.5 |
| 2024 | 6 | #12,196 | 3.5 |
| 2022 | 5 | #14,116 | 2.9 |
| 2021 | 6 | #11,978 | 3.4 |
| 2019 | 8 | #9,643 | 4.5 |
| 2018 | 6 | #11,984 | 3.3 |
| 2016 | 12 | #7,096 | 6.3 |
| 2015 | 9 | #8,665 | 4.7 |
| 2014 | 14 | #6,271 | 7.3 |
| 2013 | 10 | #8,039 | 5.3 |
Every recorded year (92)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2012 | 10 | #8,068 | 5.3 |
| 2011 | 13 | #6,537 | 6.8 |
| 2010 | 13 | #6,657 | 6.8 |
| 2009 | 13 | #6,767 | 6.6 |
| 2008 | 14 | #6,357 | 6.9 |
| 2007 | 23 | #4,353 | 11.1 |
| 2006 | 18 | #5,048 | 8.8 |
| 2005 | 19 | #4,613 | 9.5 |
| 2004 | 17 | #4,980 | 8.6 |
| 2003 | 14 | #5,515 | 7.1 |
| 2002 | 22 | #3,892 | 11.3 |
| 2001 | 18 | #4,448 | 9.3 |
| 2000 | 15 | #5,009 | 7.6 |
| 1999 | 9 | #7,054 | 4.7 |
| 1998 | 9 | #6,778 | 4.7 |
| 1997 | 19 | #3,716 | 10.1 |
| 1996 | 9 | #6,437 | 4.8 |
| 1995 | 18 | #3,673 | 9.5 |
| 1994 | 19 | #3,572 | 9.8 |
| 1993 | 26 | #2,769 | 13.3 |
| 1992 | 19 | #3,442 | 9.5 |
| 1991 | 14 | #4,196 | 6.9 |
| 1990 | 18 | #3,445 | 8.8 |
| 1989 | 26 | #2,530 | 13.0 |
| 1988 | 14 | #3,681 | 7.3 |
| 1987 | 13 | #3,699 | 7.0 |
| 1986 | 13 | #3,627 | 7.1 |
| 1985 | 7 | #5,709 | 3.8 |
| 1984 | 8 | #4,915 | 4.4 |
| 1983 | 9 | #4,457 | 5.0 |
| 1982 | 13 | #3,464 | 7.2 |
| 1981 | 10 | #4,121 | 5.6 |
| 1980 | 8 | #4,895 | 4.5 |
| 1979 | 17 | #2,765 | 9.9 |
| 1978 | 20 | #2,371 | 12.2 |
| 1977 | 11 | #3,581 | 6.7 |
| 1976 | 13 | #3,077 | 8.3 |
| 1975 | 17 | #2,528 | 10.9 |
| 1974 | 14 | #2,785 | 8.9 |
| 1973 | 16 | #2,502 | 10.3 |
| 1972 | 27 | #1,715 | 16.7 |
| 1971 | 13 | #2,800 | 7.4 |
| 1969 | 6 | #4,362 | 3.4 |
| 1968 | 5 | #4,680 | 2.9 |
| 1967 | 5 | #4,483 | 2.9 |
| 1966 | 10 | #2,767 | 5.6 |
| 1965 | 6 | #3,888 | 3.2 |
| 1964 | 6 | #3,994 | 3.0 |
| 1963 | 5 | #4,572 | 2.5 |
| 1962 | 5 | #4,576 | 2.4 |
| 1959 | 8 | #3,256 | 3.7 |
| 1958 | 6 | #3,900 | 2.8 |
| 1955 | 5 | #4,342 | 2.4 |
| 1953 | 5 | #4,282 | 2.5 |
| 1951 | 9 | #2,831 | 4.8 |
| 1948 | 6 | #3,627 | 3.4 |
| 1944 | 5 | #3,849 | 3.7 |
| 1943 | 5 | #3,990 | 3.5 |
| 1941 | 5 | #3,953 | 4.1 |
| 1940 | 5 | #3,890 | 4.3 |
| 1935 | 5 | #4,093 | 4.8 |
| 1932 | 6 | #3,737 | 5.7 |
| 1931 | 7 | #3,366 | 6.7 |
| 1930 | 9 | #2,994 | 8.2 |
| 1929 | 13 | #2,308 | 12.1 |
| 1928 | 11 | #2,629 | 9.9 |
| 1927 | 13 | #2,394 | 11.5 |
| 1926 | 18 | #1,903 | 16.2 |
| 1925 | 15 | #2,177 | 13.4 |
| 1924 | 15 | #2,215 | 13.2 |
| 1923 | 22 | #1,688 | 20.1 |
| 1922 | 10 | #2,986 | 9.2 |
| 1921 | 20 | #1,822 | 18.2 |
| 1920 | 16 | #2,118 | 15.0 |
| 1919 | 18 | #1,871 | 18.4 |
| 1918 | 27 | #1,397 | 26.6 |
| 1917 | 12 | #2,406 | 13.0 |
| 1916 | 11 | #2,522 | 12.4 |
| 1915 | 17 | #1,775 | 20.0 |
| 1914 | 14 | #1,763 | 21.4 |
| 1913 | 8 | #2,249 | 15.6 |
| 1912 | 9 | #1,874 | 20.9 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Thadeus a boy’s or a girl’s name?
Thadeus has been recorded only for boys: SSA lists no girls with the name in 92 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Thadeus: the SSA national file counts each sex separately.
How many people are named Thadeus, and how old are they?
An estimated 763 Americans named Thadeus and born in the U.S. are alive in 2026 (68% of everyone recorded); the median is 33 years old and half are between 21 and 48. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 852 people named Thadeus (0 women and girls, 852 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 768 born in the U.S. The Census count is 11% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
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).
How common is the spelling Thadeus?
Thadeus is a less common spelling of Thaddeus: SSA has recorded 1,123 Thadeus and 26,089 Thaddeus since 1880.
Of these 8 names spelled alike, given to 29,640 babies since 1880, Thadeus is the second most given (3.8% of them). In 2025 it was given to 6 of their 330 babies (1.8%), the third most given that year.
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.
More about Thadeus and names like it
- Compare Thadeus and ThaddeusBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1910sThadeus peaked in 1918.
- Pennsylvania’s most given namesThe state where SSA recorded the most babies named Thadeus since 1910.
- The top names of 1918The year the most babies were named Thadeus.
- The names of Generation ZMost people named Thadeus alive today were born 1997-2012.
- Names starting with TMost given first.