I think I just found Martha hiding in the tree of one of my Ancestry DNA matches. The match links two otherwise unconnected clusters of matches, including my NC Savage cluster. There's a "Martha Ann" (no last name) in the tree, b. 1832 in SC, with parents born in NC/GA. She's married to James S. Goodwin. Looks like they lived in Florida, then Alabama. Now to see if I can find her last name listed somewhere to confirm that it's her. Maybe in the marriage or death record for one of her kids? And maybe if I find her own death record it'll list her parents.