Surname ประยูรศักดิ์ (ประยูรศักดิ์ 
, Prayoonsak , Prayunsak ) , all over the world, is a rare last name. The family name ประยูรศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, ประยูรศักดิ์ is the forename as well as the last name.