Hi; I have good info on the above. William Robert Fortner who married Wilmith Dorris/Morris, was the brother to my Gr gf Andrew J. Fortner.
John died during the Civil War. He drown on the Steamer "General Lyon" during the Civil War.
Somewhere I have a paper where William got custody, of John's 2 sons. They left Illinois and went to Stoddard Co. Missouri. You will find the boys there. Loretta firstname.lastname@example.org