William Fleming - John Middleton Fleming

I do not think this is the correct father of John Middleton Fleming (b 1740 d 1794). In another William Fleming's will in Westmoreland, VA from 1767 it mentions his wife Abigail and children. There is a John and different children than listed here. Does anyone have information on this William Fleming that married Abigail and lived in Cople, Westmoreland, Va and died 1767?