If you are still searching for your family, I may have a little more to add.
I think Eli Williams and Betsy Walling are buried in the old Somerford Cemetery, in Somerford, Madison County, Ohio. One of their descendents have added them to find a grave. I have requested photos of the tombstones (if they still exist). On one of Madison County OH genealogy sites, they have an index of wills which shows Betsy's father, D'Lashmut Walling, was in Clark County OH when he passed. They list his wife and children. I can't proof this Eli is descended from James Williams and Elizabeth Walling yet. I am descended from Isaac Williams and Polly Logsdon through their daughter, Susanna.
I will be glad to share what I have found on the Williams family.