I can't find where John Gassaway Watkins was married to Mary Katherine Jones.
The two links in his About section go to sites that do not have her listed as one of his two wives. In fact, his Find-a-Grave page has this:
John's 1st wife was Mary Marshall Bryan. This couple had one child: Francis Benjamin Watkins, M.D.
John's 2nd wife was Mary Warman (1699-1768) in 1715 at Anne Arundel County, Maryland. John was 26 years old, and Mary was 17 years old.
Is there some documentation for a third marriage / marriage to Mary Katherine Jones? If not, it's messing up Geni pathways because I was following the Profile of the Day on astronaut Neil Armstrong and my son's connection goes through Margaret (Watkins) Terrill who is connected as the daughter of John Gassaway Watkins and this Mary Katherine Jones who doesn't appear to be oneo f his wives.