In Norse mythology, Gram, (Old Norse Gramr, meaning Wrath) is the sword that Sigurd used to kill the dragon Fafnir. It is primarily used by the Volsungs in the Volsunga Saga. However, it is also seen in other legends, such as the Thidrekssaga wielded by Hildebrand. In modern times fantasy writers have paid homage to it by naming magical swords after it, thereby greatly increasing its renown.
In The Nibelungenlied Gram is renamed Balmung