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In the entire world, ธรรมวรรณ (ธรรมวรรณ , Thumwan , Khammawan ) is a very rare epicene first name. The first name ธรรมวรรณ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare unisex name. More frequently, ธรรมวรรณ is the last name as well as the forename.