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Family name Окен (Oken , Окен , Auken ) , worldwide, is quite a rare last name. The family name Окен is characteristic of Kyrgyzstan, where it is quite a rare surname, Denmark, and Japan, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in India, Japan, and the United States. Also, Окен is the forename as well as the last name.