I knew a Henry and Rachel Williams that lived in McCall TX.
They were kin to my brother-in-law. We visited them around 1980 or 1981. They were quite elderly by not as old as the ones you refer to. They are both deceased now. I think Uncle Hendry was from Vernon Parish. I can remember they had a son that died of bone cancer at a young age. I do have a picture of them taken when we were there.