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Cognomen Ruhican (Ruhican ) , in all the world, is an extremely rare surname. Much more frequently, Ruhican is the forename as well as the last name.
Er, Top, Kaya, Alpay, Ateş, Demir, Baydan, Dikici, Şayır, Albayrak, Şimşek, Sarialioglu, and Yıldırım