Within the UK and Ireland, the surname Deegan most frequently occurs in Ireland where it is carried by 1 in every 1,930 people. The majority of those with the family name of Deegan are to be found living in/around Leinster, Munster and, to a lesser extent, Ulster. The name can also be found in Scotland with 1 in 25,256 people using it, and England with 1 in 33,561.
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