Last name เพลินสุข (เพลินสุข 
, Ploysook 
, Ploensuk ) , all over the world, is a rare family name. The cognomen เพลินสุข is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, เพลินสุข is the forename as well as the last name.