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Family name Fien (Fen , Fien ) , in the entire world, is a common cognomen. The cognomen Fien is characteristic of South-eastern Asia, particularly Malaysia, where it is a common surname, Brunei, where it is quite a rare surname, and Singapore. Measured by absolute frequency, this name is the most popular in Malaysia, Indonesia, and China. Also, Fien is the forename as well as the last name.