Porrone has a stump in Rome and one in the Iserniese at Poggio Sannita, that could derive from names of localities such as the Contrada Porronis of Carpineto Romano, Porroni is specific to Viterbo, Montefiascone and Viterbo, which could derive from the name of the village of Porrona In the Grossetano, these surnames could also derive from the Accreitive form of the medieval name Porrus, traces of these cognitizations are found in Rome in a script of February 11, 1570: "... Filippo Porroni Romano Menato Fora of the Palace of the Inquisition and Denanzi at the door Apichato.. ".
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