I can't identify your people, but they probably belong to my Muckleroy family. They were in Franklin Co., TN on the 1820 census. The heads of the families were Isaac and Elijah on that census. I don't have a Robert in that family. Robert was a fairly popular name. Check any name that sounds like it. Muckle, McRoy, McElroy, McLeroy - just anything likely. I'll try to look around in my "stuff" as I remember this query. Most of the Muckleroys are kin. We just have to find the right branch. Isaac's brother, Micajah (Michael) was there for a while, but I didn't see that he had sons of those names. There were some over in Lincoln Co., TN. It is pretty easy to Google Muckleroy. You might get lucky.