Cognomen พงศ์สุนทร (พงศ์สุนทร 
, Pongsoontorn, Pongsoonthorn ) , throughout the world, is an extremely rare last name. The cognomen พงศ์สุนทร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, พงศ์สุนทร is the forename as well as the last name.