Major-General Lord Robert William Manners, CB (14 December 1781 – 15 November 1835) was a British soldier and nobleman.
He was the third son of Charles Manners, 4th Duke of Rutland and Lady Mary Somerset, daughter of Charles Somerset, 4th Duke of Beaufort. They were members of the Prince of Wales' set. He and his brother Charles Manners were among the financial supporters of their friend George Bryan Brummell, aka "Beau" Brummell, during his long exile in Calais and Caen. Lord Robert commanded the 10th (Prince of Wales's Own) Regiment of (Light) Dragoons (Hussars) during the Waterloo Campaign.
With a break of one year between 1831 and 1832, he represented various constituencies of the family interest in Parliament from 1802 until his death.
He died suddenly in the afternoon of 15November 1835 at Belvoir Castle, Leicestershire,[1] and was interred in the estate's mausoleum.[2]