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Last name Vajda (Vaida , Vajda , Вайда ) , around the world, is a common surname. The last name Vajda is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Romania, and Slovakia (explore the name in all countries). Measured by absolute frequency, the name is most common in Hungary, India, and Romania. Very seldom, Vajda is the forename as well as the last name.