I couldn't help notice that your ggg-gf, Jacob McKee, was born in TN and then moved to Newton county, MO. I have a GGG-gf name John McKee who was also born in TN in 1820, but when he had gotten married to Nancy Pogue, they later moved to Newton county, MO. Later in life, he moved to Tulare county, CA. Is it possible that your ggg-gf, Jacob and my ggg-gf, John were brothers? Was your ggg-gf born somewhere in or near Greene county, TN? I look forward in hearing from you for I'm stuck on John.