Thadeus is a rare variant of Thaddeus that peaked in 1918 and has since faded.
Thadeus is a boy name. In 2025 it ranked #11,845 for boy births in the United States (and #24,456 across all names), given to 6 babies. Thadeus was first reported in SSA data in 1912 and peaked in 1918 (27 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 6 | 6 | #11,845 |
| 2024 | 6 | 6 | #12,201 |
| 2022 | 5 | 5 | #14,122 |
| 2021 | 6 | 6 | #11,984 |
| 2019 | 8 | 8 | #9,648 |
| 2018 | 6 | 6 | #11,990 |
| 2016 | 12 | 12 | #7,101 |
| 2015 | 9 | 9 | #8,670 |
| 2014 | 14 | 14 | #6,275 |
| 2013 | 10 | 10 | #8,044 |
| 2012 | 10 | 10 | #8,074 |
| 2011 | 13 | 13 | #6,543 |
| 2010 | 13 | 13 | #6,663 |
| 2009 | 13 | 13 | #6,771 |
| 2008 | 14 | 14 | #6,362 |
| 2007 | 23 | 23 | #4,355 |
| 2006 | 18 | 18 | #5,052 |
| 2005 | 19 | 19 | #4,618 |
| 2004 | 17 | 17 | #4,985 |
| 2003 | 14 | 14 | #5,522 |
| 2002 | 22 | 22 | #3,897 |
| 2001 | 18 | 18 | #4,454 |
| 2000 | 15 | 15 | #5,016 |
| 1999 | 9 | 9 | #7,061 |
| 1998 | 9 | 9 | #6,785 |
| 1997 | 19 | — | #3,721 |
| 1996 | 9 | — | #6,444 |
| 1995 | 18 | — | #3,679 |
| 1994 | 19 | — | #3,578 |
| 1993 | 26 | — | #2,775 |
| 1992 | 19 | — | #3,448 |
| 1991 | 14 | — | #4,203 |
| 1990 | 18 | — | #3,451 |
| 1989 | 26 | — | #2,536 |
| 1988 | 14 | — | #3,686 |
| 1987 | 13 | — | #3,704 |
| 1986 | 13 | — | #3,631 |
| 1985 | 7 | — | #5,714 |
| 1984 | 8 | — | #4,919 |
| 1983 | 9 | — | #4,459 |
| 1982 | 13 | — | #3,465 |
| 1981 | 10 | — | #4,123 |
| 1980 | 8 | — | #4,897 |
| 1979 | 17 | — | #2,766 |
| 1978 | 20 | — | #2,371 |
| 1977 | 11 | — | #3,583 |
| 1976 | 13 | — | #3,078 |
| 1975 | 17 | — | #2,530 |
| 1974 | 14 | — | #2,787 |
| 1973 | 16 | — | #2,504 |
| 1972 | 27 | — | #1,715 |
| 1971 | 13 | — | #2,802 |
| 1969 | 6 | — | #4,363 |
| 1968 | 5 | — | #4,682 |
| 1967 | 5 | — | #4,484 |
| 1966 | 10 | — | #2,768 |
| 1965 | 6 | — | #3,889 |
| 1964 | 6 | — | #3,995 |
| 1963 | 5 | — | #4,574 |
| 1962 | 5 | — | #4,577 |
| 1959 | 8 | — | #3,257 |
| 1958 | 6 | — | #3,901 |
| 1955 | 5 | — | #4,343 |
| 1953 | 5 | — | #4,285 |
| 1951 | 9 | — | #2,832 |
| 1948 | 6 | — | #3,629 |
| 1944 | 5 | — | #3,851 |
| 1943 | 5 | — | #3,991 |
| 1941 | 5 | — | #3,954 |
| 1940 | 5 | — | #3,891 |
| 1935 | 5 | — | #4,095 |
| 1932 | 6 | — | #3,739 |
| 1931 | 7 | — | #3,367 |
| 1930 | 9 | — | #2,996 |
| 1929 | 13 | — | #2,309 |
| 1928 | 11 | — | #2,629 |
| 1927 | 13 | — | #2,394 |
| 1926 | 18 | — | #1,903 |
| 1925 | 15 | — | #2,178 |
| 1924 | 15 | — | #2,215 |
| 1923 | 22 | — | #1,689 |
| 1922 | 10 | — | #2,987 |
| 1921 | 20 | — | #1,822 |
| 1920 | 16 | — | #2,119 |
| 1919 | 18 | — | #1,872 |
| 1918 | 27 | — | #1,398 |
| 1917 | 12 | — | #2,407 |
| 1916 | 11 | — | #2,523 |
| 1915 | 17 | — | #1,776 |
| 1914 | 14 | — | #1,764 |
| 1913 | 8 | — | #2,250 |
| 1912 | 9 | — | #1,875 |