Hmmm, Mary Futch Kingsbury can't be the daughter of the Mary Johns who married James Futch, now that I realize that Mary Johns was born around 1861, which makes her too young to be the mother of Mary Futch.
However, other relatives of James Futch and Mary Johns may turn out to be the Futch/Johns parents of Mary Futch Kingsbury. I would recommend focusing research in Bradford County, Florida.