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Surname Dalton (Dalton , דלטון , Далтон ) , all over the world, is a common family name. The family name Dalton is habitual in Ireland, where it is quite a common surname, Isle of Man, and Australia (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Australia. Likewise, Dalton is the forename as well as the last name.