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Female Mary Jane Dewey Click to view Mary Jane Dewey in the family tree

Mary Jane was born on December 10th, 1863.1   Mary Jane's father was Francis Asbury Dewey and her mother was Harriet Smith.  Her paternal grandparents were Simeon Dewey and Betsey Bigelow Knight. She had two brothers named Lester Hoxie and Irving Allen.  She was the oldest of the three children. She had five half-brothers and a half-sister, named George Henry, John William, Albert Francis, Franklin Smith, Isaac Simeon and Jane Statia.1 

Family Details of Mary Jane's family with Alanson Mailery Keeney

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 1, Ed. 1 @ Tree #3310, phelps.FTW, World Family Tree Vol. 4, Ed. 1 @ Tree #2332, 2332.ftw