I've seen these 2 wills and oh my yes, they did cause confusion.At this time, have no "documentation" of Hannah Blackwood marrying Nathaniel Giles.Given how the family intermingled, it would make sense that they intermarried.Nathaniel and Hannah Blackwood Giles, only had 3 known children, 2 sons and 1 dau., the dau. being Elizabeth.Neither one of Nathaniel's sons had a dau. named Mary Ann. So I would think that by reason of deduction that the first will is that of Mary Ann Blackwood, wife of James Gardner, whose dau. Hannah married Wm. Giles. Another thought, when the Giles came out of Mecklenburg Co., not all of them came, in that some of the family stayed and I believe so did some of the Gardner's and Blackwood's.It is possible that the 2nd will you show is that of some of the family that stayed behind. In the 1st will it mentions the dau., Mary Sloan.Mary Gardner was the wife of John Sloan.They had 11 children that I know of, 2 of them being James Gardner Sloan, and John Blackwood Sloan.Naming patterns can be big clues.