Cognomen สังขสิทธิ์ (สังขสิทธิ์ 
, Sangsaksit ) , globally, is a very rare surname. The cognomen สังขสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, สังขสิทธิ์ is the forename as well as the last name.