Cognomen ทศรัตน์ (ทศรัตน์ 
, Tossarat , Tosarat 
) , all around the world, is a very rare last name. The last name ทศรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, ทศรัตน์ is the forename as well as the last name.