First of all, the story has been told that the Union soliders came through and burned down the courthouse and mos tof the records kept prior to that burning down so it is difficult to find real "proof" of some things.
However, we beleive that our ancestor, Eli J. McGinty was a son born to Robert and Nancy in 1855. The last census we can find with Robert and Nancy in it is 1850. That census shows an age of 37 for Nancy and 42 for Robert with John, Newton, Jane, William, Eliza and Margaret. That would mean that Nancy was born in 1813 and Robert N. in 1808.
We have heard that Nancy may have died in childbirth (with the birth of Eli in 1855) or in some epidemic. It was before 1860 because she is no in the 1860 census but her children are scattered among relatives, including her mother Charity Couch who had Charity (also born after the 1850 census) and Jane. As you say, Hardin had Joseph with him and he was a brother of Nancy. Our Eli ends up in Red River Cty, TN with another family that is a distant relative of McGinty's.
Frank Stobuck may have been related to Joseph's wife as many times family members took in the family of thier relatives who passed away.
We have never been able to confirm what happened to either Robert N. either but it is beleived from Civil War records that he may have been serving and captured at Shiloh and died in prison...but again, no records.