Across the world, Phen (เพ็ญ 
, Phen 
, เพ็น ) is quite a common unisex forename. The first name Phen is habitual in Thailand, where it is quite a rare mostly female, but infrequently masculine name, Taiwan, where it is a rare female name, and Indonesia, where it is a rare unisex name. In absolute terms, this name is the most popular in Thailand, Indonesia, and India. Very seldom, Phen is the last name as well as the forename.