Dear John
will go back to familysearch in a while to chase up the details that I earlier referred to, but want to show you an amazing coincidence .......
I have just been browsing in the Wantage marriage records for the early 1700s looking for a completely unrelated family, and have found the following!
1757 17th October, marriage of John Jilling, single man of Wantage, and Sarah Weaving, of Goosey, Stanford, witnesses Francis Fortescue and John Noke.

KN
I note that there is a cluster of Fortescue baptisms & burials in Wantage from the 1780s onwards but no Francis. You may well know about these already.