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Male Henry Harrison Dewey Click to view Henry Harrison Dewey in the family tree

Henry Harrison was born on March 20th, 1841 in Berlin, VT.1   Henry Harrison's father was Harry Hovey Dewey and his mother was Mary Louisa Comings.  His paternal grandparents were Israel Dewey and Nancy Hovey; his maternal grandparents were Fenno Commings and Rebecca Smart. He had three brothers and three sisters, named John Calvin, Benjamin Fenno, William Whipple, Lucia Louisa, Anna and Mary Evalina.  He was the third oldest of the seven 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