Cognomen ขวัญพลอย (ขวัญพลอย 
, Khwanploy ) , in all the world, is a very rare last name. The cognomen ขวัญพลอย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ขวัญพลอย is the forename as well as the last name.