I have Thomas as son of Lewis Morgan(1728-1814) and Christine Ann White (1727-1814) who had the following children: Abonijah 1744 m. Sarah Brumley 1765 in Baltimore, MD; Thomas I b. 1761, William I b. 1748 m. Sarah Price 1777;
Morgan Morgan (Yes, they really did name the poor kid this) b. 1750.

Thomas I b. 1761 Bedford Co. VA d. 1845 m. Sarah Elizabeth Goff who was b. 1761 and d. after 1791. Their children were Thomas L. 1782 m. Sarah Willett 1806; Sarah b. 1784 m. John Gray 23 Jun 1804; James B. b. 1786 m. Martha Margaret Unknown 22 Mar 1805; Lewis b. 13 Nov 1788 m. Nancy Evans 1813; William b. 29 Nov 1789 m. Martha Nancy Johnson 1818; Mary b. 4 Sep 1797 m. Abraham II Moore 20 Sep. 1815. Some of these people lived in Camp Creek area of Greene Co. TN.
You might look in Bedford Co. VA for the marriage of Thomas and Sarah, because they did not marry in Greene Co. TN.