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Cognomen Suy (ស៊ុយ , Suy , Суй ) , globally, is a common surname. The last name Suy is characteristic of Cambodia, where it is a common surname, Guatemala, where it is quite a common surname, and Belgium, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Cambodia, Guatemala, and Indonesia. Much less frequently, Suy is the forename as well as the last name.