Tanzi Surname in Italy

The surname Tanzi originates from multiple distinct lineages spread across Italy. In Apulia, particularly in the Bari area including towns like Casamassima and Noicattaro, related surnames such as Tanzella, which is very rare, and Tanzelli, almost unique, are found. The Tanzi surname itself occurs prominently in Emilia-Romagna, especially Parma province, as well as in Lazio (province of Frosinone) and Apulia, with possible smaller presence near Milan. Other variations include Tanzilli, which has a significant cluster in Rome and the Frosinone area (Roccasecca, Sora, Castrocielo) and a minor group in Naples; Tanzillo, mainly associated with the Naples region, particularly Acerra, Cimitile, Nola and Naples, with further pockets in Caserta and Benevento provinces; Tanzini, found specifically in the Tuscan area between Florence and Siena; and Tanzino, which is almost unique. These surnames likely derive from shortened or diminutive forms of medieval personal names such as Costanzo or Lattanzio, reflecting a common onomastic origin with subsequent adaptations influenced by dialectal and regional variation.