Family name ประชาวงศ์ (Prachyawong 
, ประชาวงศ์ , Prajawong ) , in the entire world, is a very rare surname. The surname ประชาวงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ประชาวงศ์ is the forename as well as the last name.