Surname ไวยสิทธิ์ (ไวยสิทธิ์ 
) , across the world, is a very rare last name. The surname ไวยสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ไวยสิทธิ์ is the forename as well as the last name.