Swanhild (or Svanhild), in Norse mythology, the beautiful daughter of the hero Sigurd and his wife, Gudrun of the Giukungs. Swanhild fell in love with the young Randver and was doomed. The story of Swanhild is told in both the 'Poetic (or Elder) Edda' and the 'Prose (or Younger) Edda', and in the 'Volsunga Saga'. Her mother, Gudrun, had been married to the hero Sigurd, and after his murder, to the greedy king of the Huns, Atli (Attila). After attempting suicide, Gudrun was taken in and married by King Jonakr of Denmark. Swanhild had thus been brought up in the royal house of Denmark.
King Jormunrek the Mighty heard of Swanhild's great beauty and wanted to marry her. He sent his son Randver to Denmark on his behalf to ask for her hand and entrusted him to bring the young woman to him. Bikki, counselor to the king, accompanied Randver and encouraged the young man to consider marrying Swanhild himself, rather than give her to his elderly father. Randver and Swanhild, having fallen in love, approved of this idea. But Bikki then betrayed Randver by telling the king that his son and Swanhild were in love. Jormunrek had his son hanged and then decided to have Swanhild killed, blaming the innocent young woman for his misfortunes.
In one version of the story, Jormunrek rode in from the forest after hunting with his men, and as Swanhild was sitting bleaching her hair, had them ride over her, trampling her to death. In another version, she was bound to the castle gate. The king's men were instructed to drive their horses over her, but when she looked at the horses, they would not tread on her. The treacherous Bikki had a sack put over Swanhild's head, and then she died under the horses hooves. When Gudrun learned of this, she incited her sons, Swanhild's stepbrothers Hamdir (or Hamthir), Sorli, and Erp, to vengeance. Jormunrek was killed, but the brothers died for their efforts.