Cognomen Phien (Phien 
, เซียน ) , around the world, is a rare last name. The surname Phien is characteristic of Malaysia, where it is a rare surname, Vietnam, and Czechia. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Vietnam, Indonesia, and Malaysia. More prevalently, Phien is the forename as well as the last name.