Mabel Byron McClure's "The Abernathys", p. 11 (1934) states that the Robert Abernathy who married Sarah Nichols was the son of Miles Abernathy and Sarah Jones (the Widow Good), but McClure's booklet did not list children for eitherMiles or son Robert. She also wrote that Sarah Ann Abernathy sold several negros to her son Robert in KY on 2 Oct 1804.
Birdie Abernathy Jamison's notes also list the Robert who married Sarah Nichols as being the son of Miles and the Widow Good, and also cites that 1804 bill of sale between Sarah Abernathy and her son Robert in Kentucky.
Arvord's Abernathy's 1994 compilation (p. 48) references notes in Birdie Abernathy Jamison's handwriting as showing the children of Miles and the Widow Good as only Battie (d. 1852) and Robert (md 6/23/1783 Sarah Nichols).Elsewhere in that same compilation, however, Arvord lists the children as Battie Sr, Jones, Elizabeth (Mrs Farrar) and John who md. Catherine Nance/Nantz, omitting Robert.
It would appear that the known sons of Robert Abernathy (of the 3rd generation) and wf Mary (Harwell) Abernathy who produced a son and at least one grandson named Robert were as follows:
1)Robert md Sarah Abernathy: son Robert (1741-1832) md Ann Nance; grandson Robert (1775-aft 1832) 2) John md Lucy Harwell: son Robert (1752-1845) md Abigail Harwell; grandson Robert (abt 1818-??) 3) David md Ann Turner: son Robert (1751-??); grandson Robert (1800-1884) 4) Miles md Sarah Jones: son Robert (1752-abt 1832) md Sarah Nichols; grandson Robert (1793-1857)
That's at least 8 Roberts in 2 generations all apparently living in much the same area.
Is it any wonder that there is a confusion of Roberts?
P.S. if you feel I have date errors on any of the above Roberts, feel free to provide me evidence to the contrary.