Hello--I am a very distant cousin of yours. I do not descend through Dorsey Marion Isom, but through his sister Mary Ann Isom Key. I read back through the thread and was very excited to see my 3Gr-Grandparents Jonathan and Martha (Patsy) Miles Isom, Dorsey Marion Isom's parents, mentioned. I descend through Mary Ann/Dempsey Key's youngest child, Phoebe Key Briley (b. 1854), who lost her mother at age 3 and then her father Dempsey Key was last heard from in 1856 when he bought land: lots of rumors swirling that he ran off or was killed by Indians but no definitive proof.
Kay