Family name พงษ์เสถียร (พงษ์เสถียร 
, Phongsathian ) , all around the world, is a very rare cognomen. The surname พงษ์เสถียร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, พงษ์เสถียร is the forename as well as the last name.