Cognomen Flien (Fly 
, Flien 
) , around the world, is a common last name. The family name Flien is characteristic of Greenland, where it is a common surname, Myanmar, where it is quite a rare surname, and Botswana. Measured by absolute frequency, it is the most numerous in Myanmar, the United States, and Indonesia. Likewise, Flien is the forename as well as the last name.