Is Mary a daughter of Charles Hann & Jemima Walton who married 18 Jan 1790 in Montacute, in accordance with family tree # 41192329 on ancestry. com. au ? This reference has Mary having three children with Luke Hockey (1783-1837), with her possible death in 1822 from a complication of childbirth (of George).
Is Mary Hann related to the Hann family from the Stours region of Dorset who were the ancestors of convict John Hann (1800-1857) who arrived in NSW in 1824 on "Guildford"? His paternal line was Joseph Hann (ca 1766-1838), John Hann (1735-1795) & Richrad Hann (ca 1710-1760)?