Cassani seems to have three areas of origin, Lombardy and in particular the province of Varese and Milan, Emilia and Romagna and the province of Genoa, while Cassano is present throughout Italy, especially in the south and in Puglia above all. These surnames should derive from toponyms such as Cassano, present in Avellino, Milan, Varese, Bari, Cosenza and many other parts of Italy, but we cannot exclude a derivation from the Italianization of the Arabic name Hassan which has the meaning of beautiful, cute. Cassano is an ancient noble family, Guglielmo and Bartolomeo Cassano were feudal lords in Naples by mandate of King Manfredi and Carlo I d'Angiò. In Puglia in 1330 we find Blasco and Giovanni, his son, Castellani of Brindisi, and subsequently viceroy ofella Calabria, in 1435 we find of the Cassano to participate in the government of Naples.
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