Last name กฤตยารัตน์ (กฤตยารัตน์ 
, Krityarat ) , in the world, is a very rare surname. The family name กฤตยารัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, กฤตยารัตน์ is the forename as well as the last name.