Baron Ponsonby of Imokilly

His son, the second Baron, was a prominent diplomat and notably served as Ambassador to the Ottoman Empire and Austria.

In 1839 he was created Viscount Ponsonby, of Imokilly in the County of Cork, in the Peerage of the United Kingdom.

Lord Ponsonby died childless and was succeeded by his first cousin, the fourth Baron.

The aforementioned the Honourable Sir William Ponsonby, second son of the first Baron, was a Major-General in the British Army and was killed in action at the Battle of Waterloo.

The aforementioned the Right Reverend the Honourable Richard Ponsonby, third son of the first Baron, was Bishop of Derry and Raphoe.