>
Family name ดุลยสิทธิ์ (ดุลยสิทธิ์ , Dulayasith ) , in all the world, is a rare last name. The last name ดุลยสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ดุลยสิทธิ์ is the forename as well as the last name.