I am very curious about the "Unknown b 1805" that you have listed.We are not certain about the birthdate of ggg grandfather Isaac Joseph Thompson. The birthdate has been listed as 1796, 1797, 1802 and 1805.All sources state that he was born NC.He died in the late 1890s, which makes the earlier birthdates suspect.
Isaac Joseph Thompson had a grandson named (out of the blue) Lorenzo Thompson.No other family member had this name--and it was a very large family!This makes me wonder ifour Lorenzo Thompson wasnamed after a great uncle (Lorenzo Dow Thompson) or if Isaac Joseph Thompson wasconnected to the Nathan Thompson line in some other fashion.
Did any of Nathan's children end up in E. Tennessee???