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Male John Calvin Dewey Click to view John Calvin Dewey in the family tree

John Calvin was born on April 18th, 1843 in Berlin, VT.1   John Calvin'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 Henry Harrison, Benjamin Fenno, William Whipple, Lucia Louisa, Anna and Mary Evalina.  He was the fourth 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