Within the UK and Ireland, the surname Gwyther most frequently occurs in Wales where it is carried by 1 in 9,688 people. The majority of those with the family name of Gwyther are to be found living in/around Pembrokeshire, City and County of Swansea and, to a lesser extent, Torfaen County Borough. The name can also be found in England with 1 in 71,221 people using it.
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