On is typically Calabrian, of Crotone in particular, but also of carafe of Catanzaro in Catanzaro, of Cutro in Crotonese and of Spezzano Albanian and Lungro in the Cosentino, Sulli has a stump in Trieste, one in Pescara and one in L'Aquila and Castel del Monte Nell'aquilano , one in Rome and one in Sicily in Palermo and Palazzo Adriano, Sul has a log in Castelvetere on heat in the Avellinese, Sant'Antonio Abate, Naples, Castellammare di Stabia and Caivano in the Neapolitan and Sessa Aurunca in the Casertano, with a small stump Also in Foggia, they may derive from nicknames originated from the Late Latin voice sullus, a contracted form of suillus, for Porcello, perhaps indicating that the ancestor bred pigs, in some cases may derive from the Arabic name Sullus, or the Latin name On. Additions provided by Giovanni Vezzelli on the Calabrian surname from the dialect voice ' on ' = fodder grass, sort of clover. The Calabrian surname is from the dialectal voice ' sullu ' = sort of snail.
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