William Le Poer Trench British politician (1837–1920) (1837–1920) Parents William Trench, 3rd Earl of Clancarty Lady Sarah Butler Children Power Le Poer Trench William Martins Le Poer Trench Siblings Richard Trench, 4th Earl of Clancarty Power Henry Le Poer Trench Lady Sarah Le Poer Trench Frederick Le Poer Trench Lady Anne Le Poer Trench Partners Harriet Maria Georgina Martins