| Honorific-Prefix: | His Grace |
| The Duke of Hamilton | |
| Post-Nominals: | TD, DL |
| Birth Date: | 6 March 1862 |
| Birth Place: | Shanklin, Isle of Wight, England |
| Death Place: | Ferne House, Dorset, England |
| 13th Duke of Hamilton | |
| Tenure: | 1895–1940 |
| Other Titles: | 10th Duke of Brandon 9th Earl of Selkirk |
| Predecessor: | William Douglas-Hamilton, 12th Duke of Hamilton |
| Successor: | Douglas Douglas-Hamilton, 14th Duke of Hamilton |
| Issue: | Douglas Douglas-Hamilton, 14th Duke of Hamilton Lady Jean Douglas-Hamilton George Douglas-Hamilton, 10th Earl of Selkirk Lady Margaret Douglas-Hamilton Lord Malcolm Douglas-Hamilton Lord David Douglas-Hamilton Lady Mairi Nina Douglas-Hamilton |
| Parents: | Captain Charles Douglas-Hamilton |
Lieutenant Alfred Douglas Douglas-Hamilton, 13th Duke of Hamilton and 10th Duke of Brandon TD, DL (6 March 1862 – 16 March 1940) was a Scottish nobleman and sailor.
Hamilton was born at Shanklin, Isle of Wight, in 1862, the son of Captain Charles Douglas-Hamilton (1808–1873). His grandfather, Augustus Hamilton, was a son of Charles Powell Hamilton, himself a grandson of James Hamilton, 4th Duke of Hamilton. As a young man, Hamilton was commissioned into the Royal Navy, and held the rank of lieutenant. He gained the reputation for being able to dive under the keels of the battleships on which he served, without any equipment, reappearing on the opposite side of the ship to the amazement of his crewmates. In 1888, his fourth cousin, William Douglas-Hamilton, 12th Duke of Hamilton, persuaded him to leave the navy. By then, he was the heir presumptive of the Duke, who had no son.
There was a serious possibility that Alfred Hamilton would provide a good match for the twelfth duke's daughter, Lady Mary, but such hopes were dashed in 1890, when Hamilton was partially paralysed by a rare tropical disease he had caught while overseas on his last tour of duty. Hamilton recovered and succeeded to the dukedom in 1895.
While the new duke inherited all entailed property and assets from his cousin, as well as a £1 million debt secured on them, most of the unentailed Hamilton estates went to Lady Mary, who in 1906 married James Graham, 6th Duke of Montrose. The properties that left the Hamilton family at this time included Brodick Castle on Arran, which had been owned by the Hamiltons for 500 years.
One property that did not leave the family was Hamilton Palace, the main family seat. The new Duke was also hereditary keeper of the Palace of Holyroodhouse. However, the Duke offered Hamilton Palace to the Royal Navy during the First World War for use as a hospital. Following the end of the war it was considered necessary to demolish it due to subsidence, blamed on the family's own coal mines. Hamilton lived instead at Dungavel House, which had previously been a Hamilton shooting lodge on moorland close to Strathaven.
Hamilton was honorary lieutenant-colonel of the 4th Battalion, Highland Light Infantry.
He was also honorary colonel of the 6th Battalion, the Cameronians (Scottish Rifles).
Hamilton died shortly after his 78th birthday, on 16 March 1940 at the family's property in Dorset, Ferne House.
On 4 December 1901, at the parish church of Newton Tony, Wiltshire, Hamilton married Nina Mary Benita Poore, a daughter of Major Robert Poore.[1] She was the founder of the Animal Defence and Anti-Vivisection Society. They had four sons and three daughters:
Hamilton's sons made RAF history by all being of the rank of Squadron Leader or above at the outbreak of the Second World War.