Within the UK and Ireland, the surname Gilroy most frequently occurs in Ireland where it is carried by 1 in 5,149 people. The majority of those with the family name of Gilroy are to be found living in/around Leinster (approx. 8% of all UK Gilroy's), Connaught and Ulster. The name can also be found in Scotland with 1 in 8,829 people using it, and England with 1 in 25,376.
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