[2] In 1785 he became the final sinecure holder of the office of Clerk of the Irish Privy Council, which title after his death was given to his deputies.
Two years later he assumed by Royal licence the surname of Ellis in lieu of Agar.
[1] Lord Clifden married Lady Caroline, daughter of George Spencer, 4th Duke of Marlborough, in 1792.
Lord Clifden remained a widower until his death at Hanover Square, Mayfair, London, in July 1836, aged 75.
He was succeeded in his titles by his grandson Henry, the eldest son of Lord Dover.