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Surname Delaney (Delaney , Делани , ديلاني) , in all the world, is a common cognomen. The cognomen Delaney is habitual in Ireland, where it is a common surname, Saint Kitts and Nevis, where it is quite a common surname, and Jersey (explore the name in all countries). Not in comparison with a country's population, the name is most common in the United States, Ireland, and the United Kingdom. Much less frequently, Delaney is the forename as well as the last name.