John Manners, 3rd Duke of Rutland (October 21,1696 - May 29,1779) succeeded to the title in 1721, cutting short a brief career in the House of Commons, where he had represented Rutland as a Whig.
He held a variety of government and court positions including Lord-Lieutenant of Leicestershire 1721-1729, Chancellor of the Duchy of Lancaster 1727-1736, Lord Steward of the Household 1755-1761, and Master of the Horse 1761-1766.
In 1717 he married Bridget Sutton,a 17-year-old heiress,and the eldest of their sons was John Manners, Marquess of Granby. In 1722 he became a Knight of the Order of the Garter and in 1727 was sworn of the Privy Council.
Earl of Rutland and Duke of Rutland are titles in the peerage of England, derived from Rutland, a traditional county.
The title Earl of Rutland fell in to disuse upon his death at the battle of Agincourt, and was assumed by other members of the House of York including first earl's nephew Richard Plantagenet, Duke of York, the father of King Edward IV.
The subsidiary titles of the Duke are: Marquess of Granby (created 1703), Earl of Rutland (1525), Baron Manners, of Haddon in the County of Derby (1679), and Baron Roos of Belvoir, of Belvoir in the County of Leicester (1896).