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Surname Roys (Roys , رويس , Ройс ) , throughout the world, is quite a common last name. The cognomen Roys is habitual in Aruba, where it is quite a common surname, Iraq, where it is quite a rare surname, and Palestinian Territory. Not in comparison with a country's population, it is the most numerous in the United States, Iraq, and Yemen. Likewise, Roys is the forename as well as the last name.