Hugo José O'Donnell y Duque de Estrada, 7th Duke of Tetuán, GE, KM, FRHistS (born 29 September 1948), is a Spanish peer, naval officer, lawyer and historian who was the vice president of the International Commission for Maritime History, censor of the Royal Academy of History, and elected member of the Royal Historical Society.

He succeeded his father, Leopoldo O'Donnell y Lara, as Duke of Tetuán with all its titles and honours on 05 October 2005.

Hugh O'Donel, deceased on 11 July 2023, and whom he succeeded as Chief of the Name, according to the opinions of authors Curley and Ellis referenced below, even though Fr.

[4] The duke is an active member of the Clan Association of O'Donnell of Tyrconnell (of Ireland),[3] and he is a Knight of Malta.

He was elected to Medalla nº 2 of the Royal Academy of History on 22 June 2001, and he took up his seat on 1 February 2004.