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Last name Oganisian (Оганисян , Oganisian , Оганисьян ) , around the world, is quite a rare cognomen. The surname Oganisian is characteristic of Russia, where it is quite a rare surname, Belarus, and Armenia, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Russia, Belarus, and Ukraine. Much less frequently, Oganisian is the forename as well as the last name.