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.