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Surname Simonin (Simonin , Симонин , Симонен) , in the world, is quite a common cognomen. The surname Simonin is habitual in Western Europe, particularly France, where it is quite a rare surname, Switzerland, and Luxembourg. Measured by absolute frequency, it most frequently occurs in France, Switzerland, and the United States. Much less frequently, Simonin is the forename as well as the last name.