Cognomen แก้วคุณ (Kaewkhun 
, แก้วคุณ, Kaeokhun ) , around the world, is a very rare last name. The last name แก้วคุณ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, แก้วคุณ is the forename as well as the last name.