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