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Cognomen Cosson (科森 , Cosson , Коссон ) , throughout the world, is quite a common surname. The family name Cosson is habitual in France, where it is quite a rare surname, Switzerland, where it is a rare surname, and Australia. Not in comparison with a country's population, it is commonest in France, the United States, and Australia. Very seldom, Cosson is the forename as well as the last name.