Petrazzi, very rare, is Roman, Petrazzini, extremely rare, it would seem from the central north, Petrazzo, absolutely rare, is from the lower part of Udine, Petrazzoli, very rare, is Parmesan, Petrazzuoli is specific to the area of Alvignano and Ruviano in the Caserta area, Petrazzuolo is typical Neapolitan with a probably secondary lineage at Sala Consilina (SA), Pietrazzini, almost unique, is from central Italy, all derive from modifications and hypocorisms of the name Pietro, but it is also possible a derivation from names of places indicated as Petrazzi or pietraie.
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