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

Mary was born on July 7th, 1810 in ,Miami,Oh..1   Mary's father was Amos (Enos) Duncan and her mother was Elizabeth (Polly) Beale.  Her paternal grandparents were Samuel Duncan and Mary Embree. She had a brother named Isaac.  She was the younger of the two children. She had six half-brothers and two half-sisters, named John, Samuel, Nelson, Moses, Aaron, Amos, Sarah and Elizabeth.1 

1 1356.ftw
Further sources/citations:
World Family Tree Vol. 2, Ed. 1 @ Tree #1356, 1356.ftw, World Family Tree Vol. 2, Ed. 1 @ Tree #1356