Within the UK and Ireland, the surname Thornton most frequently occurs in Ireland where it is carried by 1 in every 1,607 people. The majority of those with the family name of Thornton are to be found living in/around Leinster (approx. 6% of all UK Thornton's), Ulster and Connaught. The name can also be found in England with 1 in 2,377 people using it.
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