Mercy ShermanBorn: Oct. 20, 1711 in Dartmouth, Bristol County, Mass. Died: Before 1780, exact date and place unknown. Her father was William Sherman Her mother was Susannah Allen She was married Oct. 12, 1732 to George Russell in Dartmouth, MA. Her birth date may be incorrect as her sister Rebecca has a DOB of Oct. 5, 1711 - two weeks prior to Mercy's. Information from the will of her father, William Sherman. Genealogy HOME Search Tool.