Duke of Wellington (title) Upon the death of his cousin, Garret Wesley and his inheritance of the Estates of Dangan and Mornington, Richard Colley (d. 1758) and his wife Elizabeth Sale (d. 17 June 1738) daughter of John Sale, Registrar of the Diocese of Dublin, on 23 December 1719. adopted the name Wellesley (from both Elizabeth's maternal family side from Catherine Wellesley Cusack her grandmother) and through her Husband's Family, his cousin, Garret Wesley (Wellesley). Duke of Wellington (title) Duke of Wellington is a title in the Peerage of the United Kingdom. It derived from Wellington in Somerset, and was created for Arthur Wellesley,
Richard Wellesley, 1st Marquess Wellesley 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 made his name as Governor-General of Bengal between 1798 and 1805, and he later served as Foreign Secretary in the British Cabinet and as Lord Lieutenant of Ireland. He was the eldest son of The 1st Earl of Mornington, an Irish