The Duke family DNA project is making possible the identification of separate family groups bearing the surname “Duke” through distinctive yDNA patterns. Families with similar and related surnames (Dukes, Duc, Dugue, DuGué, or other variants) are also included in this surname group. The study also allows us to clarify the internal histories of these family groups. Full interpretive results and yDNA data are presented at: http://freepages.genealogy.rootsweb.com/~dukedna/dukedna.htm. Some individuals are included in these additional pages who are not represented in the FamilyTreeDNA databases.