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Throughout the world, Asen (Asen , Асен , 阿森 ) is a common dominantly boy's, but infrequently feminine given name. The given name Asen is characteristic of Bulgaria, where it is a common masculine name, Aland Islands, where it is quite a common male name, and Ethiopia, where it is quite a common unisex name. Measured by absolute frequency, the name is most common in Bulgaria, Ethiopia, and Nigeria. Much less frequently, Asen is the last name as well as the forename.
Asen is also a name for the fictitious and mythical characters: Arsène Lupin III , the fictional character created by Monkey Punch, The Castle of Cagliostro and Arsène Lupin , the fictional gentleman thief and master of disguise created by French writer Maurice Leblanc, Arsène Lupin.