Cognomen Tanasuk (ธนศักดิ์ 
, Tanasuk 
, ธนสุข ) , all around the world, is a rare last name. The family name Tanasuk is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much more prevalently, Tanasuk is the forename as well as the last name.