Hi,
I am gggg grandson of Thomas Jones who lived on the Pigg River adjacent to the Rentfros in the same time frame as your Isaac Jones. He later migrated with his sons-in-law to Tennessee. His wife's name was Mary and one descendant believes that she was a Rentfro. Can you shed any light on this or tie him in to Isaac. I think Thomas may have been son of Robert Jones who had property adjoining.
Ed O'Brien