George Manners (Scarborough MP) explained

Captain George Manners (4 June 1747  - 27 June 1772) was a British soldier and politician, the illegitimate son of John Manners, Marquess of Granby and Ann Mompesson.^[1]

Manners was enrolled at Eton from 7 July 1757 until 1762. He served as a cornet in the Blues during the Seven Years' War, and became junior captain of the 3rd King's Dragoons on 4 August 1767.^{[2] [3]} In 1768, he was elected as Member of Parliament for Scarborough, a borough frequently in the Manners interest. Manners retired from the Army on 13 August 1771, but continued to represent Scarborough until his death in 1772.

Manners' sister was Anne, the illegitimate daughter of John Manners, Marquess of Granby. She married her first cousin John Manners-Sutton.^[4]

Notes and References

1. George was born on 4 June 1747 and baptized the next day at St James, Westminster (now St James, Piccadilly). The entry in the register of baptisms reads, "George BB of John Manners Marq.s of Granby & Ann Mompesson". Source: The Register of Births and Baptisms in the Parish of St James within the Liberty of Westminster. 1741-1760.
2. Book: Austen-Leigh, Richard Arthur . The Eton College Register, 1753-1790 . Spottiswoode, Ballantyne & Co., ltd. . 1921 . 354 . 17 December 2007.
3. Book: Manners, Walter Evelyn . Some Account of the Military, Political, and Social Life of the Right Hon. John Manners Marquess of Granby . William Clowes and Sons . 1899 . 355 .
4. https://books.google.com/books?id=Taw7DVGrbRcC&dq=levett+eton&pg=RA1-PA290 The House of Commons, 1754 - 1790, Vol. 1, Lewis Namier, John Brooke, History of Parliament Trust, Secker & Warburg, London, Reissued by Boydell & Brewer, 1985