Cognomen ทวิรัตน์ (Thawirat 
, ทวิรัตน์ , Tvirat ) , throughout the world, is a very rare last name. The surname ทวิรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ทวิรัตน์ is the forename as well as the last name.