Personally I think the two pieces of evidence (Peter Jarrett being bondsman and John Calaham witnessing Thomas's will) would be enough for me to connect Nancy to Thomas with uncertain indicators and a research note in Nancy's profile explaining why she is connected. But it's up to you. I tracked down Thomas's full estate file and added it to his profile, but unfortunately there's not much more info. And even more unfortunately Abbeville land records were destroyed so those won't be of any help (often all the heirs will sell land together after their father's death).