William Wellesley-Pole, 3rd Earl of Mornington

The Right Honourable The Earl of Mornington GCH PC PC (Ire)
William Wellesley-Pole, later 1st Baron Maryborough, and later 3rd Earl of Mornington (Thomas Lawrence)
Chief Secretary for Ireland
In office 1809–1812
Monarch	George III
Prime Minister	Spencer Perceval
Preceded by	Robert Dundas
Succeeded by	Robert Peel
Postmaster General
In office 1834–1835
Monarch	William IV
Prime Minister	Sir Robert Peel, Bt
Preceded by	The Marquess Conyngham
Succeeded by	The Marquess Conyngham
Personal details
Born	William Wesley (1763-05-20)20 May 1763 Dangan Castle, County Meath
Died	22 February 1845(1845-02-22) (aged 81) Grosvenor Square, Mayfair, London
Resting place	Grosvenor Chapel
Nationality	British
Political party	Tory
Spouse	Katherine Elizabeth Forbes
Children	4
Alma mater	None

William Wellesley-Pole, 3rd Earl of Mornington, GCH, PC, PC (Ire) (20 May 1763 – 22 February 1845), known as Lord Maryborough between 1821 and 1842, was an Anglo-Irish politician and an elder brother of the Duke of Wellington. His surname changed twice: he was born with the name Wesley, which he changed to Wesley-Pole following an inheritance in 1781. In 1789 the spelling was updated to Wellesley-Pole, just as other members of the family had changed Wesley to Wellesley.