Thaddaeus
Thaddaeus was given to 10 boys in 2025, #8,181 among boys’ names; 1,045 Americans have been recorded with it since 1924 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Thaddaeus by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Thaddaeus mean?
Wiktionary, English section
Thaddaeus is “a male given name from Ancient Greek; usually spelled Thaddeus.”
Borrowed from Latin Thaddaeus, from Ancient Greek Θαδδαῖος (Thaddaîos), from Aramaic תַדַּי (Ṯaday).
/ˈθædiːəs/
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Thaddaeus?
#8,181 among boys’ names, 2025
Thaddaeus fell from #5,716 in 2015 to #8,181 in 2025 among boys’ names; its share of boys born fell from 8.3 to 5.9 per million.
29 babies in 2005, the peak
Thaddaeus peaked in 2005, when 29 boys were given it, #3,440 among boys’ names. The 10 births of 2025 are 34% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 10 | #8,181 | 5.9 |
| 2024 | 16 | #5,865 | 9.3 |
| 2023 | 15 | #6,181 | 8.8 |
| 2022 | 12 | #7,208 | 6.9 |
| 2021 | 22 | #4,607 | 12.6 |
| 2020 | 21 | #4,678 | 12.2 |
| 2019 | 14 | #6,368 | 7.8 |
| 2018 | 24 | #4,336 | 13.2 |
| 2017 | 22 | #4,574 | 11.9 |
| 2016 | 20 | #4,920 | 10.5 |
Every recorded year (59)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2015 | 16 | #5,716 | 8.3 |
| 2014 | 26 | #3,994 | 13.5 |
| 2013 | 19 | #4,954 | 10.0 |
| 2012 | 22 | #4,517 | 11.6 |
| 2011 | 19 | #4,961 | 10.0 |
| 2010 | 20 | #4,824 | 10.4 |
| 2009 | 15 | #6,048 | 7.6 |
| 2008 | 29 | #3,730 | 14.2 |
| 2007 | 20 | #4,782 | 9.6 |
| 2006 | 18 | #5,047 | 8.8 |
| 2005 | 29 | #3,440 | 14.5 |
| 2004 | 22 | #4,114 | 11.1 |
| 2003 | 16 | #5,015 | 8.1 |
| 2002 | 26 | #3,435 | 13.4 |
| 2001 | 28 | #3,215 | 14.4 |
| 2000 | 22 | #3,743 | 11.2 |
| 1999 | 16 | #4,509 | 8.3 |
| 1998 | 21 | #3,583 | 11.0 |
| 1997 | 21 | #3,437 | 11.1 |
| 1996 | 24 | #3,094 | 12.7 |
| 1995 | 19 | #3,536 | 10.0 |
| 1994 | 22 | #3,198 | 11.4 |
| 1993 | 22 | #3,127 | 11.2 |
| 1992 | 17 | #3,731 | 8.5 |
| 1991 | 22 | #2,972 | 10.9 |
| 1990 | 17 | #3,581 | 8.3 |
| 1989 | 25 | #2,599 | 12.5 |
| 1988 | 15 | #3,508 | 7.8 |
| 1987 | 17 | #3,056 | 9.1 |
| 1986 | 14 | #3,424 | 7.6 |
| 1985 | 24 | #2,287 | 13.0 |
| 1984 | 22 | #2,356 | 12.2 |
| 1983 | 9 | #4,456 | 5.0 |
| 1982 | 16 | #2,962 | 8.8 |
| 1981 | 15 | #3,015 | 8.4 |
| 1980 | 19 | #2,605 | 10.7 |
| 1979 | 13 | #3,335 | 7.6 |
| 1978 | 21 | #2,271 | 12.8 |
| 1977 | 14 | #3,028 | 8.5 |
| 1976 | 13 | #3,076 | 8.3 |
| 1975 | 13 | #3,061 | 8.3 |
| 1974 | 15 | #2,659 | 9.5 |
| 1973 | 11 | #3,193 | 7.1 |
| 1972 | 9 | #3,585 | 5.6 |
| 1971 | 8 | #3,932 | 4.5 |
| 1970 | 9 | #3,491 | 4.8 |
| 1969 | 7 | #3,908 | 3.9 |
| 1948 | 6 | #3,626 | 3.4 |
| 1924 | 6 | #4,298 | 5.3 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Thaddaeus a boy’s or a girl’s name?
Thaddaeus has been recorded only for boys: SSA lists no girls with the name in 59 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Thaddaeus: the SSA national file counts each sex separately.
How many people are named Thaddaeus, and how old are they?
An estimated 999 Americans named Thaddaeus and born in the U.S. are alive in 2026 (96% of everyone recorded); the median is 26 years old and half are between 14 and 39. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 823 people named Thaddaeus (3 women and girls, 820 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 920 born in the U.S. The Census count is 11% below that prediction. Possible reasons: people who give a short form or another name to the Census, and a survival estimate that can run high.
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 7 names spelled alike, given to 29,129 babies since 1880, Thaddaeus is the third most given (3.6% of them). In 2025 it was given to 10 of their 330 babies (3.0%), the second 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.
Names that rose and fell in the same decades as Thaddaeus
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 Thaddaeus and names like it
- Compare Thaddaeus and ThaddeusBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sThaddaeus peaked in 2005.
- Ohio’s most given namesThe state where SSA recorded the most babies named Thaddaeus since 1910.
- Ancient Greek namesWiktionary’s origin for Thaddaeus: every such name, by how often it is given.
- The top names of 2005The year the most babies were named Thaddaeus.
- The names of Generation ZMost people named Thaddaeus alive today were born 1997-2012.
- Names starting with TMost given first.