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Cognomen Ledain (Ledain ) , in the world, is quite a rare last name. The surname Ledain is habitual in France, where it is quite a rare surname, Belgium, where it is a rare surname, and Argentina, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in France, the United States, and Belgium. Much less frequently, Ledain is the forename as well as the last name.