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Family name רוסו (Russo , Roso , Rousseau ) , all over the world, is a widespread surname. The surname רוסו is characteristic of Italy, where it is a common surname, Monaco, where it is quite a common surname, and France (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Italy, France, and the United States. Much less frequently, רוסו is the forename as well as the last name.