Arthur Wellesley, 4th Duke of Wellington Arthur Wellesley, 4th Duke of Wellington Arthur Charles Wellesley, 4th Duke of Wellington, (15 March 1849 – 18 June 1934), styled Lord Arthur Wellesley from 1884 to 1900, was a British peer and politician, and a member of the well-known Wellesley family. He joined the military and served in the Household Division. Upon his childless brother's death in 1900, he inherited the family title and estates. Wellesley was born in 1849, the second son of Major-General Lord Charles Wellesley and Augusta Sophia Anne Pierrepont. Wellesley's paternal grandparents included the famous Arthur Wellesley, 1st Duke of Wellington, Catherine Pakenham and, on
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