Last name เพ็ญไพฑูรย์ (เพ็ญไพฑูรย์ 
, Phenphaithun ) , across the world, is a very rare surname. The surname เพ็ญไพฑูรย์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เพ็ญไพฑูรย์ is the forename as well as the last name.