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Cognomen Πετράκης (Petrache , Petrakis , Πετράκης ) , all over the world, is a common last name. The cognomen Πετράκης is characteristic of Greece, where it is quite a common surname, Romania, and Cyprus. In absolute terms, it most frequently occurs in Romania, Greece, and Philippines. Very seldom, Πετράκης is the forename as well as the last name.