Within the UK and Ireland, the surname Llewellyn most frequently occurs in Wales where it is carried by 1 in every 663 people. The majority of those with the family name of Llewellyn are to be found living in/around Rhondda Cynon Taf County Borough (approx. 7% of all UK Llewellyn's), City and County of Cardiff and Bridgend County Borough. The name can also be found in England with 1 in 9,198 people using it.
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