George Ponsonby styled The Honourable from 1806, was an Irish politician, who served as a Junior Lord of the Treasury in the governments under Earl Grey

Charles Grey, 2nd Earl Grey

Charles Grey, 2nd Earl Grey, KG, PC , known as Viscount Howick between 1806 and 1807, was Prime Minister of the United Kingdom of Great Britain and Ireland from 22 November 1830 to 16 July 1834. A member of the Whig Party, he backed significant reform of the British government and was among the...

 and Lord Melbourne

William Lamb, 2nd Viscount Melbourne

William Lamb, 2nd Viscount Melbourne, PC, FRS was a British Whig statesman who served as Home Secretary and Prime Minister . He is best known for his intense and successful mentoring of Queen Victoria, at ages 18-21, in the ways of politics...

 from 1832 to 1834.

He was the fourth son of William Brabazon Ponsonby

William Ponsonby, 1st Baron Ponsonby

William Brabazon Ponsonby, 1st Baron Ponsonby , PC was a leading Irish Whig politician, being a member of the Irish House of Commons, and after 1800, of the United Kingdom parliament. Ponsonby was the son of the Hon...

 and Louisa daughter of Richard Molesworth, 3rd Viscount Molesworth

Richard Molesworth, 3rd Viscount Molesworth

Field Marshal Richard Molesworth, 3rd Viscount Molesworth, PC , styled The Honourable Richard Molesworth from 1716 to 1726, was an Anglo-Irish military officer, politician and nobleman.-Military career:...

. Ponsonby represented Lismore

Lismore (Parliament of Ireland constituency)

Lismore was a constituency represented in the Irish House of Commons until 1800.-1692–1801:...

 in the Irish House of Commons

Irish House of Commons

The Irish House of Commons was the lower house of the Parliament of Ireland, that existed from 1297 until 1800. The upper house was the House of Lords...

 between 1796 and 1798. He was then elected as a Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 at a bye-election for Kilkenny County

Kilkenny County (UK Parliament constituency)

County Kilkenny parliamentary constituency was former UK Parliament County constituency in County Kilkenny in Ireland. The County constituency returned two Members of Parliament in the House of Commons of the United Kingdom of Great Britain and Ireland, from 1801 until 1885.County Kilkenny...

 in 1806 on his father, previously the sitting member, being elevated to the peerage as 1st Baron Ponsonby of Imokilly

Baron Ponsonby of Imokilly

Baron Ponsonby, of Imokilly in the County of Cork, also referred to as Baron Ponsonby of Imokilly, in the County of Cork, was a title in the Peerage of the United Kingdom. It was created in 1806 for the William Ponsonby, who had previously represented Cork City, Bandonbridge and Kilkenny in the...

, but a general election quickly followed when he was replaced in this seat by his younger brother Hon. Frederick Ponsonby

Frederick Cavendish Ponsonby

Major General The Honourable Sir Frederick Cavendish Ponsonby, GCMG, KCB, KCH , styled The Honourable from 1806 to 1837, was a British military officer, the second son of the 3rd Earl of Bessborough and Henrietta Spencer....

.

He subsequently served as for Cork County

Cork County (UK Parliament constituency)

Cork County was a parliamentary constituency in Ireland, represented in the Parliament of the United Kingdom. From 1801 to 1885 it returned two Members of Parliament to the House of Commons of the United Kingdom of Great Britain and Ireland....

 from 1806 to 1812; for Youghal

Youghal (UK Parliament constituency)

Youghal was a United Kingdom Parliament constituency, in Ireland, returning one MP. It was an original constituency represented in Parliament when the Union of Great Britain and Ireland took effect on 1 January 1801.-Boundaries:...

 in County Cork

County Cork

County Cork is a county in Ireland. It is located in the South-West Region and is also part of the province of Munster. It is named after the city of Cork . Cork County Council is the local authority for the county...

 from 1826 to 1832; and was evidently also a member of the following Parliament.

He lived at Woodbeding in Sussex

Sussex

Sussex , from the Old English Sūþsēaxe , is an historic county in South East England corresponding roughly in area to the ancient Kingdom of Sussex. It is bounded on the north by Surrey, east by Kent, south by the English Channel, and west by Hampshire, and is divided for local government into West...

. He married twice, having two sons (both of whom predeceased him) and a daughter..