Shirley, I have not yet ascertained the parents of James Abernathy or Elizabeth Cox. I can document a marriage between Richard Rockett and Eleanor Abernathy in 1789. I cannot document a marriage between Sarah Rocket and William Abernathy in 1807. Nor can I document a marriage in that year by a Harley Abernathy, which is what some claim was William's middle name. The only marriage bond from Lincoln County with an Abernathy name that comes close is one issued in 1850 to H. W. Abernathy and Eliza A. Rush, bondsman William Ramsour. I also cannot document the premis that Sarah Melvina Rockett was a daughter of James Abernathy and Elizabeth Cox.
As far as I am concerned, all of these "facts" are totally unsupported by evidence of which I might have knowledge. Heresay, in other words. If you "know for sure", please give us Abernathy researchers information as to where exists the public documents that substantiate and prove what you "know".
Genealogy that relies on hearsay rather than documentable public evidence available to everyone is all but worthless.