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Cognomen Supan (Supan , สุบรรณ , สุพรรณ์ ) , throughout the world, is a common family name. The family name Supan is habitual in Philippines, where it is quite a rare surname, Thailand, and Slovenia. In absolute terms, the name is most common in Philippines, Thailand, and the United States. Likewise, Supan is the forename as well as the last name.