Family name ต่อศักดิ์ (Torsak 
, Pusak 
, Tosak 
) , in all the world, is a rare cognomen. The last name ต่อศักดิ์ is characteristic of Turkey, where it is a rare surname, Thailand, and Hungary. In absolute terms, this name is the most popular in Turkey, Thailand, and the United States. More prevalently, ต่อศักดิ์ is the forename as well as the last name.