Surname มาลัยรัตน์ (มาลัยรัตน์ 
, Malairat ) , all over the world, is a rare last name. The family name มาลัยรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. More frequently, มาลัยรัตน์ is the forename as well as the last name.