Arthur Wellesley, Earl of Mornington Arthur Wellesley, Earl of Mornington Arthur Gerald Wellesley, Earl of Mornington (born 31 January 1978), also known as simply Arthur Mornington, is the elder son of Charles Wellesley, 9th Duke of Wellington. Since 2014, following the succession of his father as Duke of Wellington, he is entitled to the courtesy title of Marquess of Douro but continues to use the title Earl of Mornington. The Wellesleys are an aristocratic Anglo-Irish family. Through his mother, Antonia von Preussen, Duchess of Wellington, he is a great-great-grandson of Kaiser Wilhelm II. As a descendant of Queen Victoria, he is eligible to succeed to
Richard Wellesley, 1st Marquess Wellesley honour of Richard Wellesley. The largest island in the group is Mornington Island. Mornington Peninsula, south of Melbourne, was named after him. As of the summer of 2007, a portrait of Marquess Wellesley hangs in the Throne Room at Buckingham Palace. Richard Wellesley, 1st Marquess Wellesley Richard Colley Wellesley, 1st Marquess Wellesley (20 June 1760 – 26 September 1842) was an Irish and British politician and colonial administrator. He was styled as Viscount Wellesley until 1781, when he succeeded his father as 2nd Earl of Mornington. In 1799, he was granted the Irish peerage title of Marquess Wellesley. He first