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Cognomen Nanko (Nanko , Нанко ) , in the entire world, is quite a rare last name. The last name Nanko is habitual in Bulgaria, where it is quite a rare surname, Cameroon, and Myanmar, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Cameroon, Nigeria, and Bulgaria. Also, Nanko is the forename as well as the last name.