- a town in S England, in Wiltshire: besieged and captured by Royalists in the Civil War (1642); site of Marlborough College, a public school founded in 1843. Pop: 7713 (2001)
- 1st Duke of. title of John Churchill. 1650–1722, English general; commander of British forces in the War of the Spanish Succession (1701–14), in which he won victories at Blenheim (1704), Ramillies (1706), Oudenaarde (1708), and Malplaquet (1709)