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Last name Avagyan (Авагян , Авакян , Avagyan ) , around the world, is a common surname. The cognomen Avagyan is habitual in Armenia, where it is quite a common surname, Russia, where it is quite a rare surname, and Mauritania. Measured by absolute frequency, it is the most numerous in Russia, Armenia, and Ukraine. Likewise, Avagyan is the forename as well as the last name.