The Jacob F. Abernathy you referenced a few years back in Cherokee Co, NC is a son of John D. Abernathy and Susannah Marie Forney, of Lincoln Co NC. John D. Abernthy was a Rev War Vet. I descend from two of Susannah Forney's brothers.
Jacob's siblings were: Charity, Fanny & Forney (twins), Mary/Polly, Nancy, Elizabeth, William J., Miles Washington, David, Franklin Matthew, John, and Susan.
Jacob was b. 27 Jul 1795 at Mountain Creek, Lincoln Co, NC, 7th of 13 children. His middle name was Forney, as someone surmised correctly. Jacob died in 1858 in Tomatla, Cherokee Co, NC. He had married late in life to a Sara Morgan, b. 1824 d. 1913. I have no other data on Sara.
The 1850 Agricultural Census for Cherokee County shows Jacob's farm of 100 acres had 24 head of stock, 16 sheep, 20 hogs, produced 250 Bu Rye Oats, 1000 bu. Corn, 40 lbs of Potatoes, 50 lbs of Butter and 30 lbs of wool. He was a slave-owner: the 1830 Census shows him with 6 slaves. He did not participate in the removal of the Cherokees in 1838. The 1860 Slave Schedule showed his heirs with 7 slaves.
Jacob Forney Abernathy and Sara Morgan had 6 children:
1. Marie, abt 1845, not found 1860 census.
2. Fatima Elizabeth (Tima), b.1847, m. Dr. Ben Mayfield (Surgeon, Confederate Army) and had children.
3. John, b. 1849, not found with siblings/mother/step-father on 1860 census.
4. Frank, b. 1852, not found with siblings/mother/step-father 1860 census.
5. David M., b. 1854, found 1850 and 1860 census. No further data.
6. Jacob Forney Abernathy (Jr), Physician, b. 1856, m. 1886 Victoria Hennessee and had children. Victoria b. 12 Jan 1867, but I have no other data on her.
Hope this helps.