I've got Nancy Webb sister to Asa married to a Rogers, agree?
I've also got a line going on Larkin Morris Webb that includes a different Joseph than father of Asa et al...has a William of nearly the same age as William son of Asa. Also has a George and the afore mentioned Thomas Benton Webb. Could we have confusion in DNA lineage?
A bunch of the Giles Co TN -> Oak Grove Webbs ended up in Texas in late 1830s to mid 1840s FWIW.