He had previously represented Surrey in the House of Commons and had already been created Viscount Longford in the Peerage of Ireland in 1675, with similar remainder.

Alice Aungier, sister of the first and second Earl of Longford, married Sir James Cuffe, Member of Parliament for County Mayo.

Francis's son Michael Cuffe sat as Member of Parliament for County Mayo and Longford Borough.

In 1945, sixteen years before he succeeded his elder brother, he was raised to the Peerage of the United Kingdom in his own right as Baron Pakenham, of Cowley in the City of Oxford.

As of 2017[update] the titles (other than that of Baron Pakenham of Cowley, which as a life peerage became extinct in 2001) are held by his eldest son, the eighth Earl.

Sir Thomas's son Edward Pakenham, father of the first Baron, represented County Westmeath in the Irish Parliament.

The Honourable Sir Thomas Pakenham, third son of the first Baron and the Countess of Longford, was an admiral in the Royal Navy.

He served in the Peninsular Wars under his brother-in-law, General Arthur Wellesey, who married his sister Kitty Pakenham in 1806.

The latter's eldest son Hercules Pakenham was an Ulster Unionist Party member of the Senate of Northern Ireland.

The Honourable Sir Francis Pakenham, seventh son of the second Earl, was a diplomat and notably served as Ambassador to Sweden.

Lady Violet Pakenham, daughter of the fifth Earl, was a writer and critic and the wife of the author Anthony Powell.

Elizabeth Pakenham (born Harman), Countess of Longford, wife of the seventh Earl, was a writer and social activist.

The heir apparent is the present holder's eldest son Edward Melchior Pakenham, Lord Silchester (b.

[8] King James I also granted to Lord Baron Delvin the Island and monastery of Inchemore, otherwise Inismore, in the Annalie.