Guy Dawnay (British Army officer)

Major General Guy Payan Dawnay CB, CMG, DSO, MVO (1878–1952), was an army officer and merchant banker. He is the nephew of Guy Dawnay, a politician.

Dawnay fought at the Gallipoli Campaign during the First World War.

In 1909 whilst a student at the Army Staff College at Camberley he co-founded the Chatham Dining Club with Rupert Ommanney. In 1928 he founded Dawnay Day, an investment company together with Julian Day.