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Cognomen Duclos (Duclos , Дюкло , דיקלו ) , around the world, is a common last name. The last name Duclos is characteristic of France, where it is quite a common surname, Canada, where it is quite a rare surname, and Luxembourg. Measured by absolute frequency, it is commonest in France, the United States, and Canada. Much less frequently, Duclos is the forename as well as the last name.