Within the UK and Ireland, the surname Cosgrove most frequently occurs in Ireland where it is carried by 1 in every 1,624 people. The majority of those with the family name of Cosgrove are to be found living in/around Ulster (approx. 12% of all UK Cosgrove's), Leinster and Connaught. The name can also be found in England with 1 in 12,263 people using it.
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