Within the UK and Ireland, the surname Gillham most frequently occurs in England where it is carried by 1 in 39,339 people. The majority of those with the family name of Gillham are to be found living in/around Greater London (approx. 13% of all UK Gillham's), Kent and Hampshire. The name can also be found in Wales with 1 in 53,203 people using it, and Ireland with 1 in 94,706.
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