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Male John Jay Loomis Click to view John Jay Loomis in the family tree

John Jay was born on June 11th, 1822.1   John Jay's father was Israel Loomis and his mother was Delight G. French.  His paternal grandparents were Daniel Loomis and Amy Peck. He had three brothers and two sisters, named Daniel, Laurens French, William Craig, Almira and Caroline.  He was the youngest of the six children.1 

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