Aramaic te'oma, "twin" — twin. The apostle who wanted proof, and gave English the phrase "doubting Thomas".
Thomas ranks 34th among American boys in 2025, with 6,924 born that year. Its best year was 1952, when 48,725 babies were given the name, ranking 8th. The typical living American called Thomas is about 62 years old today. It is relatively most common in Vermont, where it accounts for 0.73% 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.