I must have been nearly asleep as I missed the fact that you had the parent's names in your posting!I have a definite connection for you!
In my files I have William Harley Abernathy marrying Sarah Rockett.He was born 1781 and died February 1854.He was the son of John Abernathy born 1747 Bristol Parish, Virginia and Susannah Harwell.I'm not sure who Susannah Harwell's parents are and haven't had anyone interested enough in it to research but maybe now you will!!!John died Bef. July 1816 in Old Tyron Co., NC.. will written 18 April 1816 and probated July 1816. He took great pains to name all his children and even included their position of birth within the family.Sorry I don't have a copy of this will but I do have the names of William's siblings if you will email me.John was the s/o Robert and Sarah Abernathy Abernathy who died 1792 Lincoln County, North Carolina.Robert was s/o Robert A. Abernathy Third and Mary Miles Harwell (parents unknow for her).Robert A. died Bef. January 31, 1772 in Lincoln Co., NC.Robert A. Third was s/o Robert A. Abernathy II and Christine Tillman (genealogyLibrary.com written by Stephen F. Tillman titled "Tilghman-Tillman Family" (call number: CS71.T573) which traces the Tillman family back (or from) 1225).Robert A. Abernathy II was s/o Robert A. Abernathy, First and Sara Cubisha.He was born in Scotland and died Abt. January 1684/85 near the James River, Prince George County, Virginia.