Family name ธัญญศักดิ์ (ธัญญศักดิ์ 
, Tanyasak , Thanysak) , across the world, is a very rare last name. The family name ธัญญศักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ธัญญศักดิ์ is the forename as well as the last name.