Gosh, I don't know.I've never run across Mary Jane Shingleton before.My guess is that she would have to be a sister.I think that there are 2 men - a John and a Jonathan.
Jonathan married Isabella Jett and moved to Kentucky, later married Elizabeth Calloway.I'm not really certain that he is a brother to my William Shingleton, but am hoping someday to prove it with DNA.
John is harder to sort out. It would be easier for your just to go to my website and read what "theories" I've put together.Start here http://sarahsgenealogy.lunarpages.com/gedcom/3972.htmhttp://sarahsgenealogy.lunarpages.com/gedcom/3972.htm - it's an "Unknown Shingleton" that lists 3 sons (theory) - my line is William.
I would be interested in having anything you have about this Mary Jane Shingleton (is it truly Shingleton or Singleton?).