This may not be of any help or you may already have it, but here is what I have on Jacob Rasnic.
Jacob Rasnic had a son John E. Rasnic, b. Oct. 29, 1827, d. April 6, 1899, married Abigail Fannon, b. Sept. 12, 1827, d. June 17, 1896. (Don't have Jacob's spouse or any other children's names)
Abigail Fannon was the daughter of Bryant Fannon, b. 1791 and Abigail Muncy, b. Feb. 26, 1790.
Abaigail Muncy and Bryant Fannon were married Feb. 10, 1812 in Giles County, VA. Their children were: Nancy b. 1812; Ardena; Jesse;Thomas L. b. Mar. 8, 1822, d. Nov. 19, 1909; Abigail; Elizabeth b. 1831, d. June 13, 1885; and Loudena b. Dec. 26, 1834, d. June 26, 1897; Lucinda b. abt. 1836; and L. D. Fannon b. May 2, 1839, d. Nov. 23, 1947.
I have the some of the spouses names, and some of the children's names etc. on some of the above if you need them.
E-mail me if I can share anything else. I don't have much but am willing to share anything I have.