Thanks for that, Roger. William shows up in the tax lists from Culpeper County, which adjoins Spotsylvania County, where the news article about Hasten Poe claimed he was from. So, that's another piece of evidence that Hasten was William's son and did indeed come from Virginia.
UPDATE: I found a deed in Chatham County where Hasten Poe conveyed to Winship Stedman, his father-in-law, 334 acres of land "being the shares allotted to Hasten Poe and Delilah Poe in the division of the lands of William Poe, deceased". So, William Poe is confirmed as his father.
The remaining questions are who was William Poe's father? And was William Poe originally from Virginia?