I recieved your email but due to computer problems it was deleted before I could answer it.
I have no idea who these people were except that Mary was possibly a daughter of Thomas Whitted Jr. I say that because Thomas and Peggy Lashley Whitted had 15 children between 1807 and 1830, many whose names are unknown. Unfortunately this branch of Whitteds did not leave wills unlike the William Whitted family.
If you wish you could look online for Whitted wills and try to figure out who she was that way.