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Cognomen Caruso (Caruso , Карузо , Carusu ) , throughout the world, is a common last name. The cognomen Caruso is habitual in Italy, where it is quite a common surname, Argentina, and Switzerland, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Italy, the United States, and Argentina. Very seldom, Caruso is the forename as well as the last name.