Cagnina has a stock in San Cataldo, Santa Caterina Villarmosa and Caltanissetta in Nisseno and in Partinico and Palermo in the Palermo area, La Cagnina is typically Sicilian, from Palermo, Scicli in the Ragusa area and in the nissen of Riesi, San Cataldo and Caltanissetta, always Sicilian , is specific to Caltanissetta, it could derive from the French medieval name Cagnin, but a derivation from a dialectal alteration of a hypocoristic form of the Latin female name Cania cannot be excluded, a last hypothesis would make them derive from dialectal alterations of the Catalan term canya (bitch), but it seems very unlikely.
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