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Last name Асен (Asan , Asen , Асен ) , in the entire world, is a common family name. The last name Асен is characteristic of Bulgaria, where it is a common surname, North Macedonia, where it is quite a common surname, and Turkey (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Turkey, Ethiopia, and Bulgaria. Likewise, Асен is the forename as well as the last name.