Cognomen Диен (Dien 
, Dyen 
, Diyen ) , all over the world, is a common surname. The surname Диен is habitual in Namibia, where it is quite a rare surname, Macao, and Malaysia. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Indonesia, Vietnam, and Malaysia. Also, Диен is the forename as well as the last name.