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Cognomen Arshak (Аршак , Arshak ) , all around the world, is a rare last name. The cognomen Arshak is habitual in Georgia, where it is quite a rare surname, Ireland, where it is a rare surname, and Bulgaria. In absolute terms, the name is most common in Georgia, India, and Spain. More frequently, Arshak is the forename as well as the last name.