Cognomen วงษ์สิทธิ์ (Wongsit 
, วงษ์สิทธิ์ , Wongphsit) , across the world, is a rare surname. The last name วงษ์สิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is a very rare surname. Very seldom, วงษ์สิทธิ์ is the forename as well as the last name.