Thanks for replying. Sometimes things get a little complicated for me.
I looked on your public tree and saw that you have Peter Field Jefferson as a son of John Robertson Jefferson. This is the one I was curious about, I have him as my ggg grandfather.
This Peter Field Jefferson married Elizabeth Harrison and had a daughter Elizabeth Broome Jefferson. She married Edwin Noel in 1833 in Trigg County, KY. He died around 1845, leaving Elizabeth with 3 children. In 1848 she married Alfred Williams, my great great grandfather. They had 2 or 3 children. The children of Edwin Noel kept the Noel surname. She apparently died before 1860.