Within the UK and Ireland, the surname Sinclair most frequently occurs in Scotland where it is carried by 1 in every 533 people. The majority of those with the family name of Sinclair are to be found living in/around Highland (approx. 4% of all UK Sinclair's), Glasgow City and City of Edinburgh. The name can also be found in England with 1 in 3,157 people using it, and Ireland with 1 in 4,403.
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