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Cognomen Nadan (Nadan , نادان , Надан ) , in all the world, is quite a common surname. The cognomen Nadan is habitual in Fiji, where it is quite a common surname, Mauritius, where it is quite a rare surname, and United Arab Emirates. Not in comparison with a country's population, the name is most common in India, Saudi Arabia, and Fiji. Also, Nadan is the forename as well as the last name.