Cognomen ไพศาลสุข (ไพศาลสุข 
, Paiseansuk , Phaisaensuk ) , globally, is a very rare last name. The family name ไพศาลสุข is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ไพศาลสุข is the forename as well as the last name.