Cognomen ธรวรรณ (ธรวรรณ 
) , in the world, is an extremely rare last name. The family name ธรวรรณ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, ธรวรรณ is the forename as well as the last name.
จิวชัยศักดิ์, and เจริญ