I got nuthin' to add except a question to Virgil... Was there ever any families who went by the name "Keller" around Amite County at that time? There is a Keller family who settled around the Bayou Chicot area near here but I can't recall if they came from your area or not.
This is just a shot in the dark.
FYI... Bobby Roberts has moved to Liberty. I think a pig roast is being discussed. Even John is talking about heading over that way for a visit.