I have a lot of information on this family. I have also been to the Old Jonesborough Cemetery. It is on a hill on the edge of the town.
Z.I. was the son of Nathan Burson. I have not been able to prove it, but I think Nathan was the son of Benjamin Burson. Benjamin was definately of the Quaker family that moved to Loudoun County, Virginia, from Pennsylvania.
My great grandfather was Reason Burson, brother to Z. I. MAHoff