Earl of Londonderry extinct on the death of his great-grandson, the fourth Earl, in 1714. The second creation came in 1726 in favour of the soldier and politician Thomas Pitt, 1st Baron Londonderry. He had already been created Baron Londonderry in 1719 and was made Viscount Gallen-Ridgeway at the same time as he was granted the earldom, also in the Peerage of Ireland. He was the husband of Lady Frances Ridgeway, daughter and heiress of the fourth Earl of the first creation. A member of the prominent Pitt family, he was the uncle of William Pitt, 1st Earl of Chatham. His younger son,
George Brudenell, 3rd Earl of Cardigan Elizabeth Bruce, daughter of Thomas Bruce, 2nd Earl of Ailesbury and 3rd Earl of Elgin, in 1703. They had several children, including George, the 4th Earl, who was created Duke of Montagu in 1766, James Brudenell, 5th Earl of Cardigan, the Honourable Robert Brudenell and Thomas Brudenell-Bruce, who succeeded to the Bruce estates and was created Earl of Ailesbury in 1776. Lord Cardigan died in July 1732 and was succeeded by his eldest son, George. The Countess of Cardigan died in December 1745, aged 56. George Brudenell, 3rd Earl of Cardigan George Brudenell, 3rd Earl of Cardigan (29 September 1685