On 23 May 1859, Viscount Duncan married Juliana Cavendish Philips, eldest daughter and co-heiress of
Whig MP
Sir George Philips, 2nd Baronet and Hon. Sarah Georgiana Cavendish (eldest daughter of
Richard Cavendish, 2nd Baron Waterpark). and
Lady of the Bedchamber to
Queen Victoria who married
George Abercromby, 4th Baron Abercromby. •
George Haldane-Duncan, 4th Earl of Camperdown (1845–1933), a philanthropist who married American heiress Laura (
née Dove) Blanchard, daughter of
John Dove, in 1888. Lord Camperdown died on 30 January 1867 at the age of 54. He was succeeded in his titles by his eldest son
Robert. After Robert died unmarried in 1918, the earldom passed to his younger brother
George, upon whose death in 1933 the earldom became extinct. ==References==