Colosetti, very very rare, is typical of the Udine area, Colosi has a main lineage between Messina and Reggio and in eastern Sicily, and one in the Grosseto area, Colosio, decidedly Lombard, from Brescia and Bergamo, is very common in Botticino, Brescia, Borgosatollo, Travagliato and Provaglio D`iseo in the Brescia area and in Tavernola Bergamasca in the Bergamo area, Coloso, almost unique, could be from the Marche region, all derive from the dialectical modification of the apheresis of the name Nicola. We find traces of this surname in Bovalino (RC) in an act of the late 1600s, which reads: "Die decimo septimo mensis iunii, secundae inditionis, thousandth sixteenth century nonagesimo fourth, in Bobalini et prope land in sea ... for esequtione of the aforesaid things the aforementioned captains and sailors infrascribendi ... Costantino Colosi, Diego Casentino, Diego Tomasello ... ". additions provided by Giovanni Vezzelli Colosi is a typical surname of eastern Sicily, is the abbreviation of Nicolosi, a municipality in the province of Catania. Rohlfs 74.
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