Perhaps this will just muddy the waters further, but you may know enough to make sense of the information contained in Mary Abbott's obituary which can be found in it's entirety at FindaGrave.com, for Mary POLLOCK (1848-1906,) Bluff Cemetery, Washington County, Arkansas.
"...Deceased was 58 years of age and was born and reared near Wedington, this county, her parents being Nathaniel and Amanda ABBOTT. She was united in marriage to B.F. Pollock something over five years ago which was her fourth marriage. Her first husband was a Mr. COPELAND, her second a Mr. Jack and the third a Mr. Hale. She was devoted to all and to none more so than [her fourth husband] Mr. Pollock..."
So far I have not found any more information on Nathanial and Amanda Abbott aside from his being on the Arkansas census in Washington County in 1836.