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

John Calvin was born on August 14th, 1842 in Canton, IL.1   John Calvin's father was Alonzo Baldwin Dewey and his mother was Emeline Washburn.  His paternal grandparents were Israel Dewey and Betsey Baldwin. He had four brothers and a sister, named Andrew Spencer, Edwin Alonzo, George Israel, William Henry and Adaline Charlotte.  He was the second youngest 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