Edward Montagu, 1st Earl of Sandwich, KG (27 July 1625 – 28 May 1672) was an English naval officer. He was the only surviving son of Sir Sidney Montagu and Paulina Pepys, and was brought up at Hinchingbrooke House. Montagu was the first cousin of the father of Samuel Pepys. Pepys started his career as a minor member of the Montagu household and owed his appointments first to the Wardrobe and then as Clerk of the Acts to the Navy Board to Montagu's influence. Pepys' diary provides a detailed primary source for Montagu's career in the 1660s.