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Cognomen รุ่งรัตน์ (Rungrat , Roongrat , Roongrut ) , around the world, is a rare surname. The last name รุ่งรัตน์ is characteristic of Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, รุ่งรัตน์ is the forename as well as the last name.