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In all the world, Ясен (Yasen , Jasen , Ясен ) is a common largely male, but uncommonly feminine first name. The forename Ясен is habitual in Bulgaria, where it is quite a common masculine name, Egypt, where it is quite a rare gender-neutral name, and Syria, where it is quite a rare boy's name. Measured by absolute frequency, the name is most common in Egypt, Ethiopia, and the United States. Also, Ясен is the last name as well as the forename.