John d'Henin Hamilton, 3rd Baron Hamilton of Dalzell (1 May 1911 – 31 January 1990), was a British peer and courtier. He served with the Coldstream Guards during the Second World War, and after succeeding his uncle in the peerage in 1952, became a Lord-in-Waiting and Lord Lieutenant of Surrey.
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Early life and education
Hamilton was the only son of Major Leslie d'Henin Hamilton and his wife Amy Ricardo. Major Hamilton was a younger son of John Hamilton, 1st Baron Hamilton of Dalzell. He was educated at Eton College and the Royal Military College, Sandhurst.
Military career
Hamilton was commissioned into the Coldstream Guards as a second lieutenant on 29 January 1931. He was promoted to lieutenant on 29 January 1934. On 12 September 1937, he became a lieutenant in the Coldstream Guards reserve of officers.
During the Second World War, Hamilton saw active service with his regiment's 5th Battalion, which formed part of the Guards Armoured Division, in the Battle of Normandy, and was injured there on 18 July 1944. Hamilton was awarded the Military Cross on 30 June 1945 "in recognition of gallant and distinguished services in North West Europe". He was promoted to a substantive captaincy in the reserve of the Coldstream Guards on 1 January 1949.