Background
He was the son of Major-General Henry Ponsonby by his wife Lady Frances, daughter of Chambré Brabazon, 5th Earl of Meath.
He was the son of Major-General Henry Ponsonby by his wife Lady Frances, daughter of Chambré Brabazon, 5th Earl of Meath.
He sat in the Irish House of Commons as member for Newtownards from 1750 to 1761. They had one daughter, Frances, who married George Lowther of Kilrue on 28 July 1767. They had one daughter, Sarah, who lived at Plas Newydd with Eleanor Butler (daughter of Walter Butler of Kilkenny Castle), where they were known as the Ladies of Llangollen.