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Male Calvin Dunham Click to view Calvin Dunham in the family tree

Calvin was born after 1744.1   Calvin's father was Isaac Dunham and his mother was Jerusha Loomis.  His maternal grandparents were Philip Loomis and Hannah. He had four brothers and four sisters, named Isaac, Simeon, Levi, Elijah, Jerusha, Elizabeth, Esther and Submit.  He was the second youngest of the nine children.1 

1 phelps.FTW @ Tree #0105
Further sources/citations:
World Family Tree Vol. 3, Ed. 1 @ Tree #3669, 3669.ftw