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Male John Adams Click to view John Adams in the family tree

John was born after 1713.1   John's father was John Adams and his mother was Ruth Loomis.  His maternal grandparents were John Loomis and Sarah Boltwood. He had five brothers and five sisters, named Daniel, Samuel, Joseph, David, Andrew, Ruth, Mary, Elizabeth, Rachel and Hannah.  He was the oldest of the eleven children.1 

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