Cognomen โสจิรัตน์ (Sojirat 
, โสจิรัตน์ , Sojiirat ) , all over the world, is a very rare surname. The last name โสจิรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. More prevalently, โสจิรัตน์ is the forename as well as the last name.