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Family name Orso (Urso , Orso , Орсо ) , in the world, is a common cognomen. The surname Orso is characteristic of Italy, where it is quite a common surname, Malta, where it is quite a rare surname, and Luxembourg. In absolute terms, the name is most common in Italy, the United States, and Brazil. Much less frequently, Orso is the forename as well as the last name.