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Surname Bahdanau (Bahdanau , Бахданау ) , throughout the world, is a very rare cognomen. The cognomen Bahdanau is habitual in Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Russia, Belarus, and the United States. Very seldom, Bahdanau is the forename as well as the last name.