Cognomen แสงเพ็ญ (แสงเพ็ญ 
, Sangpen 
, Saengpen 
) , in all the world, is a rare family name. The family name แสงเพ็ญ is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Likewise, แสงเพ็ญ is the forename as well as the last name.