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Family name Vaia (Vaia , Vaya , Вайа ) , throughout the world, is a common surname. The last name Vaia is characteristic of Greece, where it is quite a common surname, Bahrain, where it is quite a rare surname, and United Arab Emirates. Not in comparison with a country's population, it is the most numerous in Greece, India, and Italy. Also, Vaia is the forename as well as the last name.