Hannah DUNCAN-PORTER is the Hannah mentioned in Joseph DUNCAN's will 1792 that you cited. Neither that Hannah nor Joseph are directly connected to Hannah PORTER m. Thomas JACKMAN, although they both connect to me. Hannah DUNCAN-PORTER is the dau of Joseph DUNCAN.
Hannah Elizabeth PORTER b. 1752 m. 1769 Thomas JACKMAN is the daughter of Thomas PORTER 1734-1799 and Sarah "Sally" WEAVER