Surname ไพศาลสิทธิ์ (Phaisansit 
, ไพศาลสิทธิ์ , Paisansit ) , in the world, is a very rare cognomen. The surname ไพศาลสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ไพศาลสิทธิ์ is the forename as well as the last name.