Family name สิทธิ์เดช (สิทธิ์เดช 
) , throughout the world, is an extremely rare cognomen. The last name สิทธิ์เดช is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Predominantly, สิทธิ์เดช is the forename as well as the last name.
สวยไธสง, สมบัติ, and อุดมพรผดุง