I have data on Gov. Lamar Alexander of TN, but I do not have the lineage that you had down to the ......Does that mean that you have a large gap between the McCallons and Gov. Lamar Alexander??
You must have come down another line than I did.My trace ancestrally goes to Samuel and Mary (Taylor) Alexander.He is one of the 7 brothers from Raphoe, County Donegal, Ire. This is also my own line but through another descendant.So, you will need to be more specific ancestrally from Gov. Lamar Alexander, or from the "...." you show.If so, I will reciprocate with all that I have for him.
Incidentally, I descend from Andrew Alexander, s/o Samuel and Mary (Taylor) Alexander.This Andrew Alexander m. Jean (Jane) McKnitt.