Duke of Wellington (title) Upon the death of his cousin, Garret Wesley and his inheritance of the Estates of Dangan and Mornington, Richard Colley (d. 1758) and his wife Elizabeth Sale (d. 17 June 1738) daughter of John Sale, Registrar of the Diocese of Dublin, on 23 December 1719. adopted the name Wellesley (from both Elizabeth's maternal family side from Catherine Wellesley Cusack her grandmother) and through her Husband's Family, his cousin, Garret Wesley (Wellesley). Duke of Wellington (title) Duke of Wellington is a title in the Peerage of the United Kingdom. It derived from Wellington in Somerset, and was created for Arthur Wellesley,
William Wellesley-Pole, 3rd Earl of Mornington 1835 Postmaster-General. From 1838 he held the honorary position of Captain of Deal Castle. On the death in 1842 of his elder brother Richard Wellesley, 1st Marquess Wellesley and 2nd Earl of Mornington, he succeeded as 3rd Earl of Mornington. In 1784 Lord Mornington married Katherine Elizabeth Forbes, daughter of Admiral John Forbes and granddaughter of the George Forbes, 3rd Earl of Granard, and of William Capell, 3rd Earl of Essex. They had the following progeny, one son and three daughters: He died on 22 February 1845. William Wellesley-Pole, 3rd Earl of Mornington William Wellesley-Pole, 3rd Earl of Mornington (20