 Frederick Trench, 3rd Baron Ashtown

Frederick Oliver Trench, 3rd Baron Ashtown (2 February 1868 – 20 March 1946) was an Anglo-Irish landowner and opponent of the United Irish League.Frederick Oliver Trench was the eldest son of Frederick Sydney Charles Trench (heir apparent to the 2nd Lord Ashtown) and Anne Le Poer Trench (eldest daughter of the 3rd Earl of Clancarty of Garbally).