Surname ประภูศักดิ์ (ประภูศักดิ์ 
, Praphusak , Prapusak ) , across the world, is a very rare cognomen. The surname ประภูศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ประภูศักดิ์ is the forename as well as the last name.