Name of the class, Iron Duke was a reference to the Duke of Wellington.
Duke University | Duke Ellington | Duke | Iron Maiden | Iron Age | Duke of Wellington | Iron Curtain | Prince William, Duke of Cambridge | Iron Man | iron | Duke of York | Iron Chef | Duke of Norfolk | Duke of Edinburgh | Duke of Burgundy | Prince Arthur, Duke of Connaught and Strathearn | Iron Cross | George Villiers, 1st Duke of Buckingham | Prince Andrew, Duke of York | Iron Chef America | Duke of Northumberland | Alfred, Duke of Saxe-Coburg and Gotha | Prince Richard, Duke of Gloucester | Prince Frederick, Duke of York and Albany | Knight's Cross of the Iron Cross | Gym Class Heroes | George Duke | Charles Lennox, 2nd Duke of Richmond | Iron Butterfly | Louis Philippe II, Duke of Orléans |