George St John, 3rd Viscount Bolingbroke

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Arms of St John: Argent, on a chief gules two mullets or

George Richard St John, 3rd Viscount Bolingbroke and 4th Viscount St John (5 March 1761 – 11 December 1824[1]), styled The Honourable from birth until 1787, was a British peer and politician. He became famous in his own lifetime for embarking on an extra-marital relationship with his own half-sister, Mary Beauclerk (his mother's daughter by her second marriage), that produced four sons. The two lovers had to leave England and live on the continent for a time.[2]


He was the elder son of the famously unhappy marriage between Frederick St John, 2nd Viscount Bolingbroke and Lady Diana Spencer, daughter of Charles Spencer, 3rd Duke of Marlborough.[3] St John was educated at Eton College in Berkshire and Christ Church, Oxford, where he matriculated in 1777.[4] He succeeded his father as viscount in 1787.[5]


St John entered the British House of Commons for Cricklade in 1782, at the age of 21, representing the constituency as Member of Parliament (MP) until 1784.[6]


On 26 February 1783, he married firstly Charlotte Collins, daughter of his former tutor Reverend Thomas Collins, and had by her two sons and a daughter.[7] After the birth of these three children, George embarked on a sexual relationship with his younger half-sister Mary Beauclerk. Mary was a twin from her mother's second marriage to Topham Beauclerk, but born in 1766 before their marriage 1768. The first child was delivered in Paris but passed off at home as a child of George and Charlotte's for a time. Charlotte was anxious to save her marriage, and hoped by this ruse to preserve the family name from infamy and her marriage from utter ruin. However, Mary Beauclerk became pregnant for the second time by George in 1788, and delivered their second child again across the Channel.

In 1789 George abandoned his wife and legitimate children. He and Mary along with their two small children left England to live together on the Continent. They travelled under the name 'Barton' and left instructions to their families not to try and find them. The story quickly reached their circle of family and influential friends, and was reported in The Times (7 July 1789). Mary went on to bear him another two sons, all of whom lived to adulthood. By May 1794 George had abandoned Mary and the four boys for another woman, Isabella Hompesch, a Belgian noblewoman. He persuaded her to marry him bigamously and then to live with him in obscurity first on the Continent, then in Britain, and finally in the United States. Their eldest children were all illegitimate.

(Mary later married 1797 an Anglo-German Bavarian count Franz Jenison von Walworth, by whom she had legitimate issue and descendants.) At least one of her sons, Robert St John, called Bob St John, was still alive and much loved by the politician Charles Fox and his mistress, later wife Elizabeth Armistead.

Charlotte, Lady Bolingbroke died in 1803, and St John married secondly Isabella Charlotte Antoinette Sophia Hompesch, Baroness von Hompesch on 1 August 1804.[7] By his second wife, he had legitimate issue, two daughters and two sons.[8] St John died, aged 63, at Pisa in Italy on a journey to regain his daughter's health[8] and was succeeded in his titles by his oldest surviving son Henry St John, 4th Viscount Bolingbroke,[5] as the oldest son George had died in 1804 just before his mother.[9]


  1. "Leigh Rayment - Peerage". Retrieved 20 June 2009.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. Hicks, Carola. Improper Pursuits: The scandalous life of an earlier Lady Diana Spencer 2001. ISBN 0-312-29157-4
  3. Burke, John (1832). A Genealogical and Heraldic History of the Peerage and Baronetage of the British Empire. vol. I (4th ed.). London: Henry Colburn and Richard Bentley. p. 127.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  4. "ThePeerage - George Richard St. John, 3rd Viscount Bolingbroke". Retrieved 16 January 2007.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>[unreliable source?]
  5. 5.0 5.1 Lodge, Edmund (1838). The Genealogy of the Existing British Peerage (6th ed.). London: Saunder and Otley. p. 57.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. "Leigh Rayment - British House of Commons, Cricklade". Retrieved 20 June 2009.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. 7.0 7.1 Debrett, John (1816). Debrett's Peerage of the United Kingdom of Great Britain and Ireland. vol. I (10th ed.). London: G. Woodfall. p. 365.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  8. 8.0 8.1 Sylvanus, Urban (1825). The Gentleman's Magazine. part I. London: John Harris. p. 179.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. Lundy, Darryl. "p. 3515 § 35146". The Peerage. External link in |publisher= (help)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>[unreliable source?]
Parliament of Great Britain
Preceded by
Paul Benfield
John Macpherson
Member of Parliament for Cricklade
1782 – 1784
With: Paul Benfield
Succeeded by
Charles Westley Coxe
Robert Adamson
Peerage of Great Britain
Preceded by
Frederick St John
Viscount Bolingbroke and St John
1787 – 1824
Succeeded by
Henry St John