Richard Wellesley, 1st Marquess Wellesley honours devolved on his brother William, Lord Maryborough, on the failure of whose issue in 1863 they fell to the 2nd Duke of Wellington. He and Arthur, after a long estrangement, had been once more on friendly terms for some years: Arthur wept at the funeral, and said that he knew of no honour greater than being Lord Wellesley's brother. The Township of Wellesley, in Ontario, Canada, was named in Richard Wellesley's honour, despite the many references (e.g.: Waterloo, Wellington County) to his brother, Arthur Wellesley in the surrounding area, as was Wellesley Island, located in the St. Lawrence river
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.