Fewer than five US girls were named Thomasine in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #1,004, reached in 1941. The most girls given the name in a single year was 67, in 1950. For comparison, it was unranked (under five girls) in 2015 and #1,132 in 1950.
Social Security card records list Thomasine in 79 years of the 146 from 1880 to 2025, starting in 1909 with 5 babies. In all, 2,234 US babies have been given the name, all of them girls. Its busiest decade was the 1940s, with 505 babies named Thomasine.
In none of the 10 years from 2016 to 2025 were five or more US girls named Thomasine.
Related spellings in the SSA files include Thomasina (3,765 babies since 1880). Rarer spellings such as Thomasene, Thomasin and Thomason are summarised on this page.
Meaning
Meaning not yet researched.
We publish a meaning only with a cited source and a confidence label, and never generate one. Meanings are being researched for the most common names first.
Wikidata records this spelling as a given name in Early Modern English, English and Old French. That is where the name is used, not necessarily where it comes from.