Submitted NameRevisions Save Gender Feminine Usage English (Archaic), Cornish (Archaic) Other Forms FormsThomasina, Tomasyn, Thomasine, Tamsin, Thomasyn (Cornish), Thomazin Edit Status Status [show contributorshide contributors] Added 2/1/2008 by anonymous Edited 5/3/2021 by LMS Meaning & History Feminine form of Thomas. Thomasin was one of the most popular girls names in the Middle Ages.
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