For background on how the map was made (and its flaws), see the relevant blog entry.
|Brereton||Quite numerous: Dublin, Tipperary etc. Ir. Bréartún. An English family located in the Midlands and Down since 16 cent. Also Cromwellian settlers.MIF & SI.|
|Brierton||rare: Dublin. English toponymic, synonymous with Brereton, q.v.|
DEDs where Brereton and a second surname are found together