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

Mary was born on October 21st, 1761 in Georgetown, ME.1   Mary's father was John Hinckley and her mother was Hannah Oliver.  Her paternal grandparents were Samuel (Twin) Hinckley and Sarah Miller. She had six brothers and three sisters, named David, Samuel, John, Miller, Ezekiel, William, Hannah, Sarah and Mehitable.1 

Family Details of Mary's family with Thomas McKinney

1 phelps.FTW
Further source/citation:
World Family Tree Vol. 16, Ed. 1 @ Tree #1604