Surname ถวิลศักดิ์ (ถวิลศักดิ์ 
, Tawilsak ) , worldwide, is a very rare family name. The last name ถวิลศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ถวิลศักดิ์ is the forename as well as the last name.