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Worldwide, Biên (Bien , Biên ) is a common epicene first name. The first name Biên is habitual in the Democratic Republic of the Congo, where it is quite a common gender-neutral name, Madagascar, where it is quite a common masculine name, and Macao, where it is quite a rare feminine name. In absolute terms, it is commonest in the Democratic Republic of the Congo, India, and Vietnam. Also, Biên is the last name as well as the forename.