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All around the world, Yasen (Yasen , 亚森 , Ясен ) is a common dominantly boy's, but uncommonly feminine first name. The first name Yasen is habitual in Bulgaria, where it is quite a common male name, Egypt, where it is quite a rare epicene name, and Syria, where it is quite a rare boy's name. In absolute terms, this name is the most popular in Egypt, China, and Ethiopia. Likewise, Yasen is the last name as well as the forename.