George Spencer, 4th Duke of Marlborough was a British Duke, politician, and military officer known for his influence in 18th–19th century Britain. Born on 26 January 1739, he played key roles in politics and the military until his death in 1817. His zodiac sign was Aquarius. Name: George Spencer, 4th Duke of Marlborough Known As: British Duke Date of Birth: 26 January 1739 Date of Death: 29 January 1817 Nationality: United Kingdom Profession: Politician, Military Officer Zodiac Sign: Aquarius