Within the UK and Ireland, the surname Thornhill most frequently occurs in England where it is carried by 1 in 14,574 people. The majority of those with the family name of Thornhill are to be found living in/around Greater London (approx. 9% of all UK Thornhill's), Derbyshire and Nottinghamshire. The name can also be found in Ireland with 1 in 25,556 people using it.
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