Richard Wellesley, 1st Marquess Wellesley peer, and Anne, the eldest daughter of The 1st Viscount Dungannon. His younger brother, Arthur, was Field Marshal The 1st Duke of Wellington. Wellesley is an ancestor of Queen Elizabeth II, as his elder daughter, Anne, was the paternal grandmother of Cecilia Bowes-Lyon, Countess of Strathmore and Kinghorne, maternal grandmother of Queen Elizabeth II. Wellesley was born in 1760 in Ireland, where his family was part of the Ascendancy, the old Anglo-Irish aristocracy. He was educated at the Royal School, Armagh, Harrow School and Eton College, where he distinguished himself as a classical scholar, and at Christ Church, Oxford. He
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.