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Last name Benso (Benso , เบ็ญโส๊ะ) , across the world, is quite a rare cognomen. The cognomen Benso is characteristic of Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and Uruguay. Not in comparison with a country's population, the name is most common in Italy, Argentina, and France. Much less frequently, Benso is the forename as well as the last name.