Arthur Wellesley, 2nd Duke of Wellington eldest son of Arthur Wellesley, 1st Duke of Wellington, and the Honourable Catherine Sarah Dorothea "Kitty" Pakenham, daughter of Edward Pakenham, 2nd Baron Longford. Lord Charles Wellesley was his younger brother and Lord Wellesley, Lord Mornington and Lord Cowley his uncles. He was educated at Temple Grove School, Eton College, Christ Church, Oxford, and Trinity College, Cambridge. He became known by the courtesy title Lord Douro when his father was created Earl of Wellington in 1812 and as Marquess of Douro in 1814 after his father was elevated to a dukedom. He was a Page of Honour from 1818 to
Richard Wellesley, 1st Marquess Wellesley for many years with Hyacinthe-Gabrielle Roland, an actress at the Palais Royal. She had three sons and two daughters by Wellesley before he married her on 29 November 1794. He moved her to London, where Hyacinthe was generally miserable, as she never learned English and she was scorned by high society: Lady Caroline Lamb was warned by her mother-in-law, Elizabeth Milbanke, a noted judge of what was socially acceptable, that no respectable woman could afford to be seen in Hyacinthe's society. Their children were: Through his eldest daughter Lady Charles Bentinck, Wellesley is a great-great-great grandfather to Queen Elizabeth II.