open to all with any association with the county of Northumberland, England ... this study project will include both Y-DNA and mtDNA testing participants ... more info coming soon ! Surnames listed as being associated with this project are being pulled from the 1851 and 1881 census of this specific area as a guide, and is not completed and or limited to just these ... nor does it imply that everyone that has one of these surnames is associated to this specific area ... more to be added soon !