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Family name Colosimo (Colosimo ) , in all the world, is quite a common surname. The last name Colosimo is characteristic of Italy, where it is quite a rare surname, Australia, and Argentina, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Italy, the United States, and Argentina. Much less frequently, Colosimo is the forename as well as the last name.