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Last name Vayda (Vayda , Вайда , Ваида ) , throughout the world, is quite a common cognomen. The last name Vayda is habitual in Marshall Islands, where it is a common surname, Ukraine, where it is quite a rare surname, and Namibia. Not in comparison with a country's population, it is the most numerous in India, Ukraine, and the United States. Much less frequently, Vayda is the forename as well as the last name.