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Last name Tumanjan (Туманян , Tumanjan , تومانيان) , throughout the world, is quite a rare family name. The last name Tumanjan is habitual in Eastern Europe, particularly Russia, where it is quite a rare surname, Ukraine, where it is a rare surname, and Belarus. In absolute terms, the name is most common in Russia, Ukraine, and Kazakhstan. Also, Tumanjan is the forename as well as the last name.