Thaddeous is a boy name. It last appeared in U.S. Social Security records in 2002. Thaddeous first appears in the data in 1962 and reached its peak in 1989 (8 births). The chart below shows how the name has risen and fallen over time.
How popular is Thaddeous? (U.S. births per year)
U.S. births per year, 1962–2002 · hover or tap for the count and national rank · source: U.S. Social Security Administration