Pedrazza, very rare, is specific to Trentino Alto Adige, Pedrazzi is typical of Emilia, in the area that includes the provinces of Modena, Bologna and Ferrara, with stocks also in Lombardy, Pedrazzo, extremely rare, seems typical of the Biella area, of Sordevolo in particular , they should all derive from dialectical hypocoristic modifications of the name Pietro.
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