Family name Fèn (Фэн 
, Fèn) , around the world, is a very rare cognomen. The family name Fèn is habitual in Armenia, where it is a rare surname, Kyrgyzstan, and Belarus, where it is a very rare surname. In absolute terms, this name is the most popular in Russia, Kyrgyzstan, and Armenia. Likewise, Fèn is the forename as well as the last name.