 In 1861, Adams married Frances "Fanny" Cadwalader Crowninshield (1839–1911), daughter of George Crowninshield (1812–1857) and Harriet Sears Crowninshield (1809–1873) of the politically powerful Crowninshield family.Fanny was the granddaughter of former United States Secretary of the Navy under presidents Madison and Monroe, Benjamin Williams Crowninshield.Adams died at age 60 in Wollaston, Massachusetts on August 14, 1894.