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Family name Ruban (Ruban , Рубан , 鲁班 ) , around the globe, is a common cognomen. The cognomen Ruban is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, and Russia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Ukraine, Russia, and Sri Lanka. Much less frequently, Ruban is the forename as well as the last name.