Within the UK and Ireland, the surname Lewis is one of the most popular; frequently occuring in Wales where it is carried by 1 in every 78 people. The majority of those with the family name of Lewis are to be found living in/around Rhondda Cynon Taf County Borough (approx. 3% of all UK Lewis's), Carmarthenshire and City and County of Swansea. The name can also be found in England with 1 in 505 people using it.
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