Last name พิบูลย์ชัย (พิบูลย์ชัย 
, Piboonchai , Phiboonchai ) , all over the world, is a very rare family name. The surname พิบูลย์ชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, พิบูลย์ชัย is the forename as well as the last name.