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