Around the world, Асень (Asen 
, Асень 
, Asenus 
) is a common mostly male, but infrequently feminine first name. The first name Асень is habitual in Bulgaria, where it is quite a common masculine name, Aland Islands, and Ethiopia, where it is quite a common epicene name. In absolute terms, it is the most numerous in Ethiopia, Bulgaria, and Nigeria. Very seldom, Асень is the last name as well as the forename.