Last name Bunyawat (Bunyawat 
, บุญญวัฒน์ , บรรยวัสถ์ ) , in the world, is a rare surname. The family name Bunyawat is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. More prevalently, Bunyawat is the forename as well as the last name.