Cognomen เพ็ญพิทักษ์ (เพ็ญพิทักษ์ 
) , in the world, is a very rare family name. The last name เพ็ญพิทักษ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, เพ็ญพิทักษ์ is the forename as well as the last name.