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Cognomen Deeny (迪尼 , Deeny ) , across the world, is a rare surname. The cognomen Deeny is habitual in Northern Europe, particularly Ireland, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and Estonia. Not in comparison with a country's population, it is the most numerous in the United Kingdom, the United States, and Ireland. Also, Deeny is the forename as well as the last name.