Family name เพ็ญพักต์ (เพ็ญพักต์ 
) , in the world, is an extremely rare last name. The cognomen เพ็ญพักต์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, เพ็ญพักต์ is the forename as well as the last name.