William Grenville, 1st Baron Grenville

The Right Honourable The Lord Grenville PC PC (Ire) FRS
Portrait by John Hoppner, c. 1800
Prime Minister of the United Kingdom
In office 11 February 1806 – 25 March 1807
Monarch	George III
Preceded by	William Pitt the Younger
Succeeded by	The Duke of Portland
Speaker of the House of Commons of Great Britain
In office 5 January 1789 – 5 June 1789
Monarch	George III
Prime Minister	William Pitt
Preceded by	Charles Wolfran Cornwall
Succeeded by	Henry Addington
Ministerial offices Foreign Secretary In office 8 June 1791 – 20 February 1801 Prime Minister William Pitt the Younger Preceded by The Marquess of Carmarthen Succeeded by The Lord Hawkesbury President of the Board of Control In office 12 March 1790 – 28 June 1793 Prime Minister William Pitt the Younger Preceded by The Viscount Sydney Succeeded by Henry Dundas Home Secretary In office 5 June 1789 – 8 June 1791 Prime Minister William Pitt the Younger Preceded by The Viscount Sydney Succeeded by Henry Dundas Vice-President of the Board of Trade In office 23 August 1786 – 8 August 1789 Prime Minister William Pitt the Younger Preceded by Office established Succeeded by The Duke of Montrose Paymaster of the Forces In office 26 December 1783 – 4 September 1789 Prime Minister William Pitt the Younger Preceded by Edmund Burke Succeeded by The Duke of Montrose Chief Secretary for Ireland In office 15 August 1782 – 2 May 1783 Prime Minister The Earl of Shelburne Preceded by Richard FitzPatrick Succeeded by William Windham
Parliamentary offices Member of Parliament for Buckinghamshire In office 1784–1790 Preceded by The Earl Verney Succeeded by James Grenville Member of Parliament for Buckingham In office 1782–1784 Preceded by Richard Aldworth-Neville Succeeded by Charles Edmund Nugent
Personal details
Born	William Wyndham Grenville (1759-10-25)25 October 1759 Wotton Underwood, Buckinghamshire, England
Died	12 January 1834(1834-01-12) (aged 74) Burnham, Buckinghamshire, England
Resting place	St Peter's Church, Burnham
Political party	Pittite Tory (before 1801, after 1816) Whig (c. 1803–1815)
Spouse	Anne Pitt ​ (m. 1792)​
Parents	George Grenville (father) Elizabeth Wyndham (mother)
Alma mater	Christ Church, Oxford
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William Wyndham Grenville, 1st Baron Grenville, PC, PC (Ire), FRS (25 October 1759 – 12 January 1834) was a British Pittite Tory politician who served as Prime Minister of the United Kingdom from 1806 to 1807, but was a supporter of the Whigs for the duration of the Napoleonic Wars. As prime minister, his most significant achievement was the abolition of the slave trade in 1807. However, his government failed to either make peace with France or to accomplish Catholic emancipation and it was dismissed in the same year.