Cognomen เรืองเพ็ญ (เรืองเพ็ญ 
, Ruengpen , Ruangpen ) , around the world, is a very rare family name. The family name เรืองเพ็ญ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, เรืองเพ็ญ is the forename as well as the last name.