My line from Francis and Isabel comes down through their son Joseph who was born in Wythe Co, Va, married in TN and then moved onto Indiana where he died.
The only children of Francis and Isabel I have seen are the ones you listed also. I have seen two different death dates for Isabel though, 1807 and after 1810. Do you know which of these are correct? Where are researchers getting Conrad Abel as Francis' father? I haven't seen that information till today.