Gerald Oakley Cadogan, 6th Earl Cadogan, CBE, DL (28 May 1869 – 4 October 1933) was a British peer and professional soldier.
He was the son of George Henry Cadogan, 5th Earl Cadogan and inherited his titles on 6 March 1915 on the death of his father, with two elder brothers having died without male heirs. He married Lilian Eleanor Marie Coxon, daughter of George Stewart Coxon, on 7 June 1911 at Christ Church, Mayfair, London. They had three children, the eldest son of whom was his heir William Gerald Charles Cadogan, 7th Earl Cadogan.[1]
He joined the Army as a lieutenant in the Life Guards, but received a staff appointment as Aide-de-Camp (ADC) to his father when the latter became Lord Lieutenant of Ireland in 1895. Cadogan continued as an Extra-ADC to Lord Dudley, who became Lord Lieutenant in August 1902,[2][3] but resigned with him in 1905.