Cognomen เพ็ญสังข์ (เพ็ญสังข์ 
) , all over the world, is an extremely rare surname. The cognomen เพ็ญสังข์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เพ็ญสังข์ is the forename as well as the last name.