Looking for Parentage of Robert V Jackson of Russell CO VA

I'm the gg grandfathers parents he was b. in russell co., va in 1825, and moved to harlen co., ky abt 1846-47. I know his father faughter in the Rev. War, and might have even died. I ahve everything on him after his marriage in Harlan Co. in 1847. So I'm looking for anything before this.