Perotta has a stock in the Neapolitan dialect, one in the north of Milan and one in the Brescia area, Perotti is typical of the Centronord, in particular of Piedmont, Lombardy and Lazio, Perotto, mainly Piedmontese, has an important stock also in the Belluno area at Pedavena and Feltre, Perrotta is very diffused in the centrosud, particularly in Campania, Potentino and Cosenza, Perrotto, almost unique, is probably due to errors of transcription of the previous one, Perrotti has a strain in the Pescara area at Villa Celiera and Penne, and in Campania in Naples, Forino (AV) and Giugliano in Campania (NA), Perozzi is from central Italy, in the area of San Benedetto del Tronto (AP) in particular, Perozzini and Perozzino are practically unique, Perozzo is typical of the provinces of Vicenza, Padua and Treviso, all derive from hypocoristic modifications more or less dialectal than the name Piero such as Perottus entered into use as a stand-alone name of which we have an example in a testament of 1539 in Palermo: "In nomine domini de our Ihesu Cristi amen. Year dominice incarnacionis thousandth quintime ninth cafeterias heuli die vero sexto tenth eiusdem mensis1 xije indicionis, hora almost septima noctis tribus luminaribus accensis iuxta iuris disposicionem. Noverint universi quod magnificus dominus Perottus Terongi, oriundus Maioricarum et civis huius felicis urbis Panormi ... "We find traces of this surname in Fano with Nicolaus Perottus (1429-1480) humanist, archbishop of Siponto, and in Fabriano from the second half from 1600, where the Perozzis are listed among the notables of the city.
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