Adam Haldane-Duncan, 2nd Earl of Camperdown

Adam Haldane-Duncan, 2nd Earl of Camperdown (25 March 1812 – 30 January 1867), styled Viscount Duncan between 1831 and 1859, was a British nobleman and politician.

Early life Hon. Adam Duncan was born in Edinburgh on 25 March 1812. He was the eldest surviving son of Robert Haldane-Duncan, 1st Earl of Camperdown and the former Janet Hamilton-Dalrymple (1783–1867).

His paternal grandparents were the former Henrietta Dundas and Adam Duncan, 1st Viscount Duncan, a well known British admiral who defeated the Dutch fleet off Camperdown in what is considered one of the most significant actions in naval history. His mother was the second daughter of Sir Hew Dalrymple, 3rd Baronet and the former Janet Duff (a daughter of William Duff of Crombie). Through his brother Hew, he was uncle to Georgiana Wilhelmina Mercer-Henderson (wife of the 7th Earl of Buckinghamshire),

Career He first entered parliament as a member for Southampton in 1837, which seat he held until 1841 when he exchanged it for Bath. He was briefly out of parliament between 1852 and 1854, when he was returned again, this time for Forfarshire. He held this seat until he was elevated to the House of Lords in 1859 on the death of his father.

Personal life 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.