Henry Wellesley, 1st Baron Cowley GCB was an Anglo-Irish diplomat and politician. He was the younger brother of the soldier and politician the first Duke of Wellington. He is known particularly for his service as British Ambassador to Spain during the Peninsular War where he acted in cooperation with his brother to gain the support of Cortes of Cádiz. His later postings included being Ambassador in Vienna where he dealt with Metternich and British Ambassador to France during the reign of Louis Philippe I.

Richard Colley Wellesley, 1st Marquess Wellesley, was an Anglo-Irish 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 of Norragh. He was also Lord Wellesley in the Peerage of Great Britain.