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Surname Duill (Duill ) , all over the world, is a very rare last name. The family name Duill is characteristic of Ireland, where it is a rare surname, Germany, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. In absolute terms, it is the most numerous in Germany, Ireland, and the United States. Much less frequently, Duill is the forename as well as the last name.