Thaddaeus is a rare variant of Thaddeus that peaked in 2005 and has grown less common since.
Thaddaeus is a boy name. In 2025 it ranked #8,185 for boy births in the United States (and #17,060 across all names), given to 10 babies. Thaddaeus was first reported in SSA data in 1924 and peaked in 2005 (29 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 10 | 10 | #8,185 |
| 2024 | 16 | 16 | #5,870 |
| 2023 | 15 | 15 | #6,186 |
| 2022 | 12 | 12 | #7,213 |
| 2021 | 22 | 22 | #4,611 |
| 2020 | 21 | 21 | #4,682 |
| 2019 | 14 | 14 | #6,373 |
| 2018 | 24 | 24 | #4,340 |
| 2017 | 22 | 22 | #4,578 |
| 2016 | 20 | 20 | #4,922 |
| 2015 | 16 | 16 | #5,720 |
| 2014 | 26 | 26 | #3,997 |
| 2013 | 19 | 19 | #4,957 |
| 2012 | 22 | 22 | #4,520 |
| 2011 | 19 | 19 | #4,963 |
| 2010 | 20 | 20 | #4,827 |
| 2009 | 15 | 15 | #6,052 |
| 2008 | 29 | 29 | #3,733 |
| 2007 | 20 | 20 | #4,784 |
| 2006 | 18 | 18 | #5,051 |
| 2005 | 29 | 29 | #3,444 |
| 2004 | 22 | 22 | #4,119 |
| 2003 | 16 | 16 | #5,020 |
| 2002 | 26 | 26 | #3,440 |
| 2001 | 28 | 28 | #3,220 |
| 2000 | 22 | 22 | #3,749 |
| 1999 | 16 | 16 | #4,514 |
| 1998 | 21 | 21 | #3,587 |
| 1997 | 21 | — | #3,442 |
| 1996 | 24 | — | #3,099 |
| 1995 | 19 | — | #3,542 |
| 1994 | 22 | — | #3,204 |
| 1993 | 22 | — | #3,133 |
| 1992 | 17 | — | #3,737 |
| 1991 | 22 | — | #2,978 |
| 1990 | 17 | — | #3,587 |
| 1989 | 25 | — | #2,605 |
| 1988 | 15 | — | #3,513 |
| 1987 | 17 | — | #3,060 |
| 1986 | 14 | — | #3,427 |
| 1985 | 24 | — | #2,288 |
| 1984 | 22 | — | #2,357 |
| 1983 | 9 | — | #4,458 |
| 1982 | 16 | — | #2,963 |
| 1981 | 15 | — | #3,017 |
| 1980 | 19 | — | #2,606 |
| 1979 | 13 | — | #3,336 |
| 1978 | 21 | — | #2,271 |
| 1977 | 14 | — | #3,029 |
| 1976 | 13 | — | #3,077 |
| 1975 | 13 | — | #3,063 |
| 1974 | 15 | — | #2,661 |
| 1973 | 11 | — | #3,195 |
| 1972 | 9 | — | #3,587 |
| 1971 | 8 | — | #3,934 |
| 1970 | 9 | — | #3,493 |
| 1969 | 7 | — | #3,909 |
| 1948 | 6 | — | #3,628 |
| 1924 | 6 | — | #4,300 |