Last name ฤทธิ์พงษ์ (ฤทธิ์พงษ์ 
) , all over the world, is a very rare family name. The surname ฤทธิ์พงษ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ฤทธิ์พงษ์ is the forename as well as the last name.