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

Calvin was born on June 12th, 1787.1   Calvin's father was Daniel Loomis and his mother was Amy Peck.  His paternal grandparents were William Loomis and Experience Smith; his maternal grandparents were Israel Peck and Sarah Adams. He had two brothers and a sister, named Daniel, Israel and Elizabeth.  He was the second youngest of the four children.  He died at the age of 3 on April 1st, 1791.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw