The Most Noble William Cavendish, 4th Duke of Devonshire, K.G. P.C.
Known as[]
- 1720-1729: The Hon. William Cavendish, commonly called Lord Cavendish
- 1729-1741: The Hon. William Cavendish, commonly called Marquess of Hartington
- 1741-1751: The Hon. William Cavendish, commonly called Marquess of Hartington, M.P.
- 1751-1755: The Lord Cavendish, commonly called Marquess of Hartington
- 1751-1755: The Lord Cavendish, commonly called Marquess of Hartington, P.C.
- 1755-1756: The Duke of Devonshire, P.C.
- 1756-1764: The Duke of Devonshire, K.G., P.C.
Education[]
- At home
Offices[]
- Master of the Horse, 1750-1755
- Lord Lieutenant of Ireland, 1755-1756
- First Lord of the Treasury, 1756-1757
- Lord Chamberlain, 1757-1762
Lord Lieutenancies[]
- Lord Lieutenant of Derbyshire, 1756-1764
Peerage Titles[]
By writ of acceleration[]
- Baron Cavendish of Hardwicke, 1751
By inheritance[]
- Duke of Devonshire, Marquess of Hartington, Earl of Devonshire, 1755
Chivalric Orders[]
- Knight of the Garter, 1756
Privy Council[]
- Privy Councillor, 1751
- Privy Councillor in Ireland, 1761
Parliamentary Positions[]
- Member of Parliament for Derbyshire, 1741-1751
Preceded by: The Duke of Newcastle |
Prime Minister and First Lord of the Treasury 1756–1757 |
Succeeded by: The Duke of Newcastle |