Within the UK and Ireland, the surname Mcilroy most frequently occurs in Scotland where it is carried by 1 in 15,382 people. The majority of those with the family name of Mcilroy are to be found living in/around North Ayrshire (approx. 9% of all UK Mcilroy's), South Lanarkshire and Glasgow City. The name can also be found in England with just 1 in every 135,874 people using it, and Ireland with 1 in 161,000.
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