Cognomen บุญวัฒน์ (บุญวัฒน์ 
, Boonyawat 
, Boonwat ) , in all the world, is quite a rare last name. The surname บุญวัฒน์ is habitual in Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Also, บุญวัฒน์ is the forename as well as the last name.