Did you ever find your information on Nathaniel? There just is not much out there...he was my fourth great grandfather. I have been able to find, just by DNA connections to other members, that he had two children I know of: Mary and Samuel. I descended from Samuel. However, I have not been able to find a wife or any other children. My research shows he was born in 1792 in Mecklenburg County, VA. I suppose it is possible Nathaniel migrated to Lauderdale County, TN, as my branch of the Stewart family migrated from that area to northeast Arkansas. A couple of censuses show Samuel as having been born in Tennessee, while another states he was born in VA. There is a Nathaniel Stewart Sr., who was awarded a land grant in Polk County, Tennessee; however, I've found nothing to connect the data to my Nathaniel.