Pedranzini is typically Valtellina, from Valdisotto, Bormio and Mantello, Pedrazzini is specific to central-western Lombardy, Milan and Lodi in particular, but also to Dosolo in the Mantua, Lodi and Sudmilano above all, could derive from a nickname originated from the dialect word Milanese pedersin (skin, end of the sacks, where they are taken to shake them), as they could also be due to a modification of the dialect name Peder (Pietro) or from the Italian medieval name, or even Spanish, Pedro.
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