Cologna is typical of the Trentino area, Colognese has a stock in the Verona area, Colognesi, has a stock in the Milanese area and one in the Rovigoto area, Cologni is typical of the area between Milan and Bergamo, Cologno is very rare and would seem to be specific to San Severo (FG), they should derive from the various toponyms containing the root Cologn-, such as Cologna (TN), Cologna Veneta (VR), Cologno al Serio (BG), Cologno Monzese (MI), Colognola ai Colli (VR) etc.
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