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Male Edmund Otis Dewey Click to view Edmund Otis Dewey in the family tree

Edmund Otis was born on August 24th, 1861 in Niles, MICH.1   Edmund Otis' father was George Martin Dewey and his mother was Emma Bingham.  His paternal grandparents were Granville Dewey and Harriet B. Freeman; his maternal grandparents were Lemuel Bingham and Lydia L. Doud. He had two brothers and three sisters, named Henry Bingham, George Martin, Harriet Belle, Emma Grace and Mary Hannah.  He was the second oldest of the six children.1 

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