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John Adams II was born on the Fourth of July in 1803 in Quincy, Massachusetts, the second son of John Quincy Adams and Louisa Johnson. He went to college at Harvard, but was expelled during his senior year for participating in a student riot.
He then studied law under his father, and became his father's private secretary in the White House. John was very loyal to his father, and even got into a fistfight in the Capitol Rotunda with Russell Jarvis, an anti-administration reporter for the Washington Daily Telegraph. An investigating committee of the House of Representatives determined that Jarvis had attacked the younger Adams and censured Jarvis.
After his father left the White House, John ran a Washington flour mill owned by his father. After a short time, his health failed, and he became ill. He died in 1834. His death, just five years after his older brother's suspected suicide, caused his father great emotional pain. His father wrote of him, "A more honest soul, or more tender heart never breathed on the face of the earth."
John Adams II, his older brother George and his younger brother Charles were all rivals for the same woman, their cousin Mary Catherine Hellen, who lived with the John Quincy Adams family after the death of her parents. In 1828 John married Mary Hellen at a ceremony in the White House, and both his brothers refused to attend. John Adams II and Mary Hellen were the parents of two daughters, Mary Louisa (02 December 1828 - 16 July 1859) and Georgiana Frances (10 September 1830 - 20 November 1839).
John Adams II died 23 Oct 1834 (aged 31) in Washington, District of Columbia, and was buried in Hancock Cemetery in Quincy, Norfolk County, Massachusetts. 
Sandra L. Quinn-Musgrove Sanford Kanter, America's Royalty: All the Presidents' Children, pages 33 to 35
Paul C. Nagel, Descent from Glory: Four Generations of the John Adams Family, 1999, page 173
Doug Wead, All the Presidents' Children, 2004, pages 226 to 227
Hugh Brogan, Charles Mosley, American Presidential Families, 1993, page 280
Lewis L. Gould, American First Ladies: Their Lives and Their Legacy, 2001, page 48
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John is 28 degrees from Alfred Nobel, 32 degrees from Henri Becquerel, 19 degrees from Niels Bohr, 18 degrees from Marie Curie, 25 degrees from Alec Fleming, 18 degrees from Howard Florey, 24 degrees from Albert Imre Szent-Györgyi, 15 degrees from Barbara McClintock, 30 degrees from Wilhelm Roentgen and 16 degrees from Chandra Garrow on our single family tree. Login to find your connection.