When did Margaret Georgiana Spencer's husband die?
Georgiana Spencer, Countess Spencer Margaret Georgiana Spencer, Countess Spencer ("née" Poyntz; 8 May 1737 – 18 March 1814), was an English philanthropist. She was born at St James's Palace as the daughter of a diplomat and a maid of honour to Caroline of Ansbach. In 1754, she married John Spencer, one of the wealthiest men of the era. A love match, the marriage resulted in the births of three surviving children, which included Georgiana Cavendish, Duchess of Devonshire. The Spencers became earl and countess in 1765, a reward granted by the Duke of Newcastle for John's political loyalty to the Whig party.
Laura Spencer-Churchill, Duchess of Marlborough Frances Laura Spencer-Churchill, Duchess of Marlborough ("née" Charteris; 10 August 1915 – 19 February 1990), was a British noblewoman and socialite. She was variously Viscountess Long, Countess of Dudley and became Duchess of Marlborough upon her fourth marriage, to John Spencer-Churchill, 10th Duke of Marlborough. She was the sister of novelist Hugo Charteris and Ann Charteris (who married Ian Fleming), as well as the granddaughter of Hugo Charteris, 11th Earl of Wemyss. Her third husband, Michael Temple Canfield, was the former husband of Lee Radziwill, sister of Jacqueline Kennedy Onassis. During World War II, she served as an auxiliary nurse.