Within the UK and Ireland, the surname Grogan most frequently occurs in Ireland where it is carried by 1 in every 1,797 people. The majority of those with the family name of Grogan are to be found living in/around Leinster (approx. 27% of all UK Grogan's), Munster and Ulster. The name can also be found in England with 1 in 15,949 people using it.
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