I am descended from this line of Adkisons as well. My great grandfather was Robert Leroy (Roy) who was the oldest son of John Russell that Missy was talking about earlier in the thread. John Russell had the following siblings: William Granville James Joseph (Jim Joe) Thomas Daniel Tucker Rebecca Sarah Jane Cora E. Samuel Robert Ralph C. Ida S. Tom Tom died at the age of 8. I believe everyone else lived and married, although one of the daughters died in childbirth. I have a sheet that describes all of this if anyone would like, I can send them a copy.
John Russell's parents were James Robert Adkison (often Robert or Bob) and Samantha Gan.
James Robert's parents were James Adkisson (listed as Atkins on the 1850 census) and Rebecca Greenwood. James died very young (early 30s) and had 3 children: William, Granville Solomon, and James Robert. Rebecca then remarried a man named Levi Shaw, but I do not believe they had any children together. Anyway, a good deal of work has been done on all three of these individuals with the most being done on Granville Solomon. William moved to Arkansas and raised a family there. Granville and James Robert stayed in MO. Samantha Gan's parents were John Gan and Sallie Ann Adams. They had 12 children: Gilford Catherine William Russell Selena Dallas Margaret John Ivan Charles Rolla Louisa Elizabeth Amanda Martha Ann
I also have a sheet describing this family if anyone would like a copy. I also have a handful of Adkison pictures including a picture of Samantha Gan if anyone would like. I do not have a picture of James Robert, so if anyone has one, please contact me. Hope this helps.