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The Duke of Hamilton | |
|---|---|
 Portrait by Franz Xaver Winterhalter, 1863 | |
| Tenure | 1863–1895 |
| Predecessor | William Hamilton, 11th Duke of Hamilton |
| Successor | Alfred Douglas-Hamilton, 13th Duke of Hamilton |
| Other titles | 9th Duke of Brandon 2nd Duke of Châtellerault 8th Earl of Selkirk |
| Born | 12 March 1845 Paddington, London, England |
| Died | 16 May 1895 (aged 50) Algiers, Algeria |
| Buried | 1895 Hamilton Mausoleum; 1921 Isle of Arran |
| Spouse(s) | Lady Mary Montagu |
| Issue | Mary Louise Graham, Duchess of Montrose |
| Parents | William Hamilton, 11th Duke of Hamilton Princess Marie Amelie of Baden |
William Alexander Louis Stephen Douglas-Hamilton, 12th Duke of Hamilton, 9th Duke of Brandon, 2nd Duke of Châtellerault KT (12 March 1845 – 16 May 1895), styled Marquess of Douglas and Clydesdale until 1863, was a Scottish nobleman.