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