David,
Are you descended from Edmund S. Gawf (1794-c1883) of Henderson Co., TN? If so, you will be interested to know that that the Goff Surname DNA Study at
http://home.comcast.net/~philgoff/DNAresults.htm has provent that Edmund S. Gawf was very closely related to Lewis R. Goff of Decatur Co., TN and also very closely related to the Barlow family. I'm interested in sharing information.
Phil Goff