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Last name Dadya (Dadya , דדיה , Дадья ) , around the world, is a rare family name. The family name Dadya is habitual in Israel, where it is quite a rare surname, Russia, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Israel, India, and Russia. Much less frequently, Dadya is the forename as well as the last name.