Cognomen พระสวัสดิ์ (พระสวัสดิ์ 
, Prakasawat ) , around the world, is a very rare last name. The surname พระสวัสดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, พระสวัสดิ์ is the forename as well as the last name.