Mariani Surname in Italy

The surname Mariani and its variants originate from the medieval personal name Marianus, documented as early as 1104 in the Annales Pisani. The form Marian is typical of the Treviso and Venice areas, while Marianelli is associated with Pisa and has a branch in the province of Rome, being widespread across central-northern Italy and Apulia. Marianini, which is very rare, has roots in Brescia, Alessandria, and Florence. The surname Mariano is mainly found in southern Italy, especially in the Salento peninsula. These surnames evolved through diminutives and dialectal changes from the medieval name Marianus. Historical records such as an eighteenth-century account from Barbarano Vicentino confirm the longstanding presence and lineage of families bearing these names.