Any chance that -Thomas b. ca. 1789 m. Margaret ?
from your list might be the parents of Celia Roberts who married Thomas Gibson in Claiborne Co., TN in 1859? They lived in Hancock Co., TN but both were from VA. He was from Pittsylvania Co., VA.
I found a Margaret in Lee Co. VA in 1850 but she appears to be the widow of Joseph Roberts.
219, 232, Emanuel Roberts 26, Nancy 23, Martha 25, Mary 23, Lawson 1, Joseph 23
227, 240, Margaret Roberts 45, Jesse 26 owns RE, Susan 24, Lucy 22, Elizabeth 20, Nancy Roberts 18, James 16, George 14, Claborne 12, Mary 10, Kissiah 8, Rebecca J. 6, One of these older girls is probably the wife of Jesse Roberts. Might one or two of the youngesters be grandchildren?
I found another Margaret in Hancock Co., TN in 1860 with a different set of kids.
612, 587, Margaret Robberts 59 mill keeper, Margaret Jr. 22, Malinda 31, Thomas 19, John 15
613, 588, Emmanuel Robberts 36, Mechanic, Nancy 34, Martha 14, Mary 12, Lazarus 10, Henry 4, George 1
The only thing they had in common was that Emanuel & Nancy Roberts were a neighbor to both.
My Celia had siblings Malinda, Margaret Jr., Thomas, John (died at Andersonville). Possibly more. I am not sure of any of these siblings except Malinda. Celia shows up in one census as Sally.