Quite a while ago, David Gammon joined the Gammon Family Tree DNA project. Finally, I got around to compiling a tree based on information from David, and my Gammon indexes. The family lived in Nottinghamshire in England, and it appears that they moved there from Gloucestershire.
William Gammon, born 1821 in Gloucestershire was the furtherest back that I could go with my indexes. But David appears to have gone back at least one more generation.
Ross Gammon's Blog 