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Last name Спирос (Spyros , Spiros , Σπύρος ) , all around the world, is quite a common family name. The cognomen Спирос is characteristic of Greece, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Bulgaria, where it is a rare surname. In absolute terms, it is the most numerous in Greece, the United States, and Australia. More prevalently, Спирос is the forename as well as the last name.