Tomassini Surname in Italy

The surname Tomassini is predominantly found in the Marche, Umbria, and Lazio regions. It originates from the medieval name Thomasinus, a Latin diminutive derived from the Greek name Thomas. Variants such as Tomasin, Tomasini, Tommasini, and others are spread across Italy, but Tomassini is notably associated with central Italy. Historical records trace the name Thomasinus back to the 13th century, including a Roman abbot in 1225 and members of the Verona council in 1252. By the 15th century, the surname Tomasini is documented in Florence. The prevalence of Tomassini in the Marche and surrounding areas indicates a linguistic and regional development distinct from related variants, which are more common in northern or southern parts of Italy.