Last name เพ็ญบูรณ์ (เพ็ญบูรณ์ 
) , all around the world, is a very rare family name. The cognomen เพ็ญบูรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, เพ็ญบูรณ์ is the forename as well as the last name.