Family name ดุลยทรรศน์ (ดุลยทรรศน์ 
) , worldwide, is an extremely rare last name. The surname ดุลยทรรศน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, ดุลยทรรศน์ is the forename as well as the last name.