Hamilton married Lady Maud Caroline, daughter of
Henry Lascelles, 3rd Earl of Harewood, in 1871. They had three sons: • Ronald James Hamilton
OBE (1872–1958), who fought in the First World War, was wounded and in 1919 invested an OBE. He was awarded with the decoration of the
Order of the Crown (Belgium). He served as
First Secretary in the Diplomatic Service. In 1915 he married Florence Marguerite (Sarah Brooke) Hanna (d. 1959). They had one daughter: • Maud Sarah Hamilton (1917–1995). In 1939 she married Squadron Leader
Count Manfred Maria Edmund Ralph Beckett Czernin von und zu Chudenitz,
DFC,
DSO,
MC,
RAF (1913–1962). With him she had one son and one daughter. • Major Anthony George Hamilton (1874–1936), who fought in the First World War with the
East Kent Regiment. He died unmarried and without issue. • Vice-Admiral Robert Cecil Hamilton (1882–1947), who fought in the First World War. In 1911 he married Edith Maud Paley (d. 1967), daughter of the barrister Algernon Herbert Paley. Hamilton died in September 1927, aged 81, at his house in
Portman Square, London. His wife survived him by eleven years and died in April 1938. ==References==