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,
Earl of Kingston In 1764 Edward was raised to the Peerage of Ireland as Baron Kingston, of Rockingham in the County of Roscommon, a revival of the barony held by his kinsmen which had become extinct three years earlier. He was further honoured when he was made Viscount Kingston, of Kingsborough in the County of Sligo, in 1766, and Earl of Kingston in 1768, also in the Peerage of Ireland. He was succeeded by his son, Robert, the second Earl, who represented County Cork in the Irish House of Commons. He married his kinswoman, the heiress Caroline Fitzgerald (died 1823), daughter of Richard