Gerald Simpson Hillairet Rutland Vere de Gaury MC (1 April 1897 – 12 January 1984) was a British military officer, Arabist, explorer, historian and diplomat.
He served in the Hampshire Regiment in the First World War, where he fought at the Somme, and was wounded on several occasions, including in the Gallipoli Campaign.
He was awarded the Military Cross in 1917: De Gaury served as the British political agent in Kuwait in the 1930s, and organized and took part in the official visit of Sir Andrew Ryan to Riyadh in November 1935, to present Ibn Sa'ud with the Order of the Bath.
He was a fluent speaker of Arabic and spent much time hunting with Ibn Sa'ud during his wartime assignment to the Nejd and Asir.
He was a close friend of Freya Stark and Lesley Blanch, who said of him: For the last twenty years of his life he lived in Sussex Square, Brighton, where he died on 12 January 1984.