Thaddeus has been given to about 26,089 people in the United States since 1880. It was most common in 2016, which makes it a current name.
Thaddeus ranks 798th among American boys in 2025, with 314 born that year. Its best year was 2016, when 416 babies were given the name, ranking 640th. The typical living American called Thaddeus is about 39 years old today. It is relatively most common in Nebraska, where it accounts for 0.04% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.