In Norse mythology, the valkyries are dísir, minor female deities, who served Odin.
This card's Japanese name, "Walkuren Ritt", is German for "Ride of the Valkyries". However, the proper German spelling would be "Walkürenritt". The German name, "Ritt der Walküre", is a more direct translation of "Ride of the Valkyries".
This is the only card to have full German in its Japanese card name.