Within the UK and Ireland, the surname Mardon most frequently occurs in Wales where it is carried by 1 in 21,354 people. The majority of those with the family name of Mardon are to be found living in/around City and County of Cardiff, Rhondda Cynon Taf County Borough and, to a lesser extent, City and County of Swansea. The name can also be found in Scotland with just 1 in every 118,043 people using it, and England with 1 in 120,907.
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