William was married to Amalia Ruhl (sp?) and had 3 boys and 2 girls that I know of, by 1880 in the St. Louis census. None of the boys were named James. The boys were William (Jr.), Otto, and Hugo.
I don't know of any other siblings of these two. There very likely could have been others. I have had no success in finding their parents. I have had some luck following a bit of William's descendancy. I am a direct descendant of Katherine (almost every document lists her as "Wilhelmine", her middle name) and her second husband, John Riefenberg, and have her complete descendancy.
Thanks for your inputs. I will let you know if I find a James in the branches!