To help you trace Ambrose Watts back, I found a couple of clues on Ancestry.com. I didn’t find any indication that he was in Tazewell County, but several of the old Wayne County settlers came through there. The 1850 Wayne County census says he was born 1798 in Georgia.
As you probably know, before 1842, Wayne County was part of Cabell. Cabell County marriages, 25 June 1818 records marriage of Hannah Jane Swearingen to Ambrose Watts. She was daughter of Leonard and Mary (Cole) Swearingen. Ambrose was son of Elias and Elenor “Nellie” (Mills) Watts.
Elias was born about 1772 and married about 1792 in Georgia. He died about 1820 in Cabell (probably Wayne now).