Cognomen ทัดศักดิ์ (Thardsak 
, ทัดศักดิ์ ) , across the world, is an extremely rare family name. The surname ทัดศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ทัดศักดิ์ is the forename as well as the last name.