Very common both in the north, Piedmont, Liguria, western Lombardy and Veneto, both in the south, Lazio, Campania, Calabria, Sicily and Salento, it should derive from the medieval name Gactus of which there is an example in Viterbo in a testament of 1306: " ... Nobilis vir dominus Viscount Gactus filius quondam domini Raynerii Gacti civis viterbiensis ... ", in Pisa in the second half of 1200 we find certain Bectus Gactus, Guccius Gactus and Andreas Gactus mentioned in some acts. additions provided by Mario Gatto The surname Gatto derives from the Longobardo Hatto, which meant combatant, Hatto becomes Gatto between the 11th and the 12th century. The term hadu in the language of the Goths meant combat, one can note the similarity and similarity with the Longobard Hatto. The name Atto o Hatto appears among the Lombards between the 6th and 12th centuries, an Act, Attone is a Lombard duke, Hatto is present in documents from 742 in Spoleto and in 773 in Rieti. The surname Gato / Gatto appears in the documentation starting from the 10th century,
Typically southern it has a Neapolitan and a Calabrese stock in Paola (CS) and in Vibo Valentia (VV), it should derive from a nickname.
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