Marquess of Hartington | |
|---|---|
| Personal details | |
| Born | William John Robert Cavendish 10 December 1917 London, England |
| Died | 9 September 1944 (aged 26) Heppen, Belgium |
| Cause of death | Killed in action |
| Political party | Conservative |
| Spouse | |
| Parents | |
| Relatives | Andrew Cavendish, 11th Duke of Devonshire (brother) |
| Alma mater | Trinity College, Cambridge |
| Military service | |
| Branch/service |  British Army |
| Rank | Major |
| Unit | Coldstream Guards, Guards Armoured Division |
| Battles/wars | Second World War |
William John Robert Cavendish, Marquess of Hartington (10 December 1917 – 9 September 1944) was a British politician and British Army officer. He was the elder son of Edward Cavendish, 10th Duke of Devonshire, and therefore the heir to the dukedom. He was killed in action in the Second World War during fighting in the Low Countries in September 1944 whilst leading a company of the Coldstream Guards.