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