Hamilton was married twice. The first marriage was on June 12, 1930, to Katherine Comly (d. 1975), the daughter of Maj. Garrard Comly at
St. Elizabeth's Chapel,
Sterlington, New York, near
Tuxedo Park. Katherine's sister, Lanier Comly, who married John Murray Mitchell, was the mother of
J. Murray Mitchell Jr. (1928–1990). They divorced in 1935 and she later married James Bogart Tailer in 1936, and after their divorce, to
George Townsend Adee (1874–1948), On December 26, 1935, the same day his divorce to his first wife was finalized in
Reno, Nevada, he married the widow, Elizabeth Malcolm Peltz Warburton Wanamaker (1905–1988). Elizabeth, the daughter of George M. Dallas Peltz (d. 1929), was first married in May 1923 to Edgerton Warburton. They divorced and in August 1932, she married Warburton's cousin, Captain John Wanamaker Jr., son of
Rodman Wanamaker and grandson of
John Wanamaker. Wanamaker died on November 29, 1934. Hamilton died of
emphysema, on May 29, 1970, while on vacation in London. ==See also==