Within the UK and Ireland, the surname Flanagan most frequently occurs in Ireland where it is carried by 1 in every 501 people. The majority of those with the family name of Flanagan are to be found living in/around Leinster (approx. 23% of all UK Flanagan's), Ulster and Munster. The name can also be found in England with 1 in 5,608 people using it.
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