Henry Wellesley, 1st Baron Cowley Henry Wellesley, 1st Baron Cowley Henry Wellesley, 1st Baron Cowley GCB (20 January 1773 – 27 April 1847) was a British diplomat and politician. Wellesley was the fifth and youngest son of Garret Wellesley, 1st Earl of Mornington, by the Honourable Anne Hill-Trevor, eldest daughter of Arthur Hill-Trevor, 1st Viscount Dungannon. He was the younger brother of Arthur Wellesley, 1st Duke of Wellington, Richard Wellesley, 1st Marquess Wellesley and William Wellesley-Pole, 3rd Earl of Mornington. He was educated at Eton and at the court of the Duke of Brunswick. He purchased an Ensigncy in the 40th Foot in 1790. Wellesley's
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.