Cognomen เพชรสุวรรณ์ (Petchsuwon 
, เพชรสุวรรณ์ ) , across the world, is a rare surname. The last name เพชรสุวรรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, เพชรสุวรรณ์ is the forename as well as the last name.