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Cognomen Seol (Seol , 설 , سيول ) , worldwide, is a common family name. The surname Seol is habitual in South Korea, where it is quite a common surname, New Zealand, where it is a rare surname, and Sudan. In absolute terms, this name is the most popular in South Korea, the United States, and Indonesia. Very seldom, Seol is the forename as well as the last name.