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Cognomen Altay (Altay , Алтаы , Алтаи ) , in all the world, is a common last name. The last name Altay is characteristic of Turkey, where it is quite a common surname, Equatorial Guinea, where it is quite a rare surname, and Cyprus. Measured by absolute frequency, it is commonest in Turkey, Iraq, and Germany. Very seldom, Altay is the forename as well as the last name.