I have the family information once they arrive in Iowa until their deaths. (The Wm C in the 1860 census is the son). But I'm having difficulty getting back further. Maybe a marriage record or something for Wm C & Aurilla would list their parents (long shot, I know), or a will or something of that nature listing them as survivors.

Thank you everyone for all of your input! I've filed it so I can access it when I get a bit more information.