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Female Mary Gilbert Click to view Mary Gilbert in the family tree

Mary was born in October 1744.1   Mary's father was Benjamin Gilbert and her mother was Elizabeth Marshfield.  Her paternal grandparents were Joseph Gilbert and Elizabeth Smith; her maternal grandparents were Josiah Marshfield and Rachel Gilbert. She had six brothers and three sisters, named Elnathan, Jonathan, Benjamin, John, Jabez, Jesse, Rachel, Elizabeth and Elizabeth.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw