Surname สิทธิรัช (สิทธิรัช 
) , all around the world, is an extremely rare family name. The family name สิทธิรัช is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Predominantly, สิทธิรัช is the forename as well as the last name.
สลักจอง, and ประเทศรัตน์