Cognomen ถิรโสภณ (ถิรโสภณ 
, Tirasopin ) , in the entire world, is a very rare last name. The family name ถิรโสภณ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ถิรโสภณ is the forename as well as the last name.