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Surname Reyen (Reyen ) , around the world, is a rare last name. The last name Reyen is habitual in Western Europe, particularly Netherlands, where it is a rare surname, Belgium, where it is a very rare surname, and France. Not in comparison with a country's population, it is the most numerous in the United States, France, and Netherlands. Likewise, Reyen is the forename as well as the last name.