Cognomen เพ็ญสดใส (เพ็ญสดใส 
, Pensodsai ) , in all the world, is a very rare surname. The cognomen เพ็ญสดใส is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เพ็ญสดใส is the forename as well as the last name.