Surname วิทยาศักดิ์ (วิทยาศักดิ์ 
, Vittayasak , Wityasak) , throughout the world, is a very rare cognomen. The last name วิทยาศักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, วิทยาศักดิ์ is the forename as well as the last name.