John Adams Harper died in 1816.
John Adams Harper was born in 1779.
John L. Harper died in 2009.
Edward John Harper died in 1990.
John Ernest Harper died in 1949.
John Russell Harper died in 1983.
John William Harper died on 1944-09-29.
He didn't.
John T. Adams died in 1939.
John Adams - cartographer - died in 1738.
John G. Adams died in 2003.
John Adams Webster died in 1877.
John Adams - educator - died in 1863.