Last name สมณศักดิ์ (สมณศักดิ์ 
, Samanasak ) , throughout the world, is a very rare family name. The surname สมณศักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, สมณศักดิ์ is the forename as well as the last name.