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Cognomen Noy (Noy , Nui , נוי ) , all over the world, is a common surname. The last name Noy is habitual in Israel, where it is quite a common surname, Laos, and Brunei, where it is quite a rare surname. In absolute terms, it is the most numerous in Israel, Laos, and Indonesia. More prevalently, Noy is the forename as well as the last name.