William III of England | George III of the United Kingdom | Henry III of England | George III | Edward III of England | Henry III | Edward III | Charles III of Spain | William III | Loudon Wainwright III | WTA Tier III tournaments | Richard III of England | Benigno Aquino III | Pope Alexander III | Star Wars Episode III: Revenge of the Sith | Henry III of France | Gustav III of Sweden | Shalmaneser III | Alexander III of Russia | Albatros D.III | Frederick III | Rainier III, Prince of Monaco | Otto III | Frederick William III of Prussia | Victor Emmanuel III of Italy | III | Frederick III, German Emperor | Wade Hampton III | Philip III of Spain | Miles Copeland III |
Several important military ventures were also named for him, including the Jagdgeschwader 26 Schlageter fighter-wing of the Luftwaffe, and the naval vessel Albert Leo Schlageter.