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,
Wilmot Vaughan, 2nd Earl of Lisburne Wilmot Vaughan, 2nd Earl of Lisburne Wilmot Vaughan, 2nd Earl of Lisburne (9 May 1755 – 6 May 1820), styled Hon. Wilmot Vaughan from 1766 to 1776 and Viscount Vaughan from 1776 to 1800, was a Welsh landowner and Irish peer. He was the son of Wilmot Vaughan, 4th Viscount Lisburne, later Earl of Lisburne, and his first wife Elizabeth Nightingale, who died of complications from his birth. He was educated at Eton College, and on 4 January 1773, he matriculated at Magdalen College, Oxford. Unfortunately, he showed signs of insanity as early as 1778, and he was declared a