[1] Ragnarr Loðbrók is a great warrior, son of the Danish king Sigurðr hringr Randvérsson.
She accompanies Ragnarr, becomes his concubine, and bears him four sons: Ivarr beinlauss, Bjǫrn járnsíði, Hvítserkr, and Sigurðr Ormr í auga.
Before dying, he sings of his deeds in the poem Krákumál, in which he invokes his sons, who later avenge their father.
The saga's sources include Adam of Bremen and Saxo Grammaticus, with whose Gesta Danorum (book IX) it overlaps in the description of Ragnar's pursuit of Thora, his marriage to Aslaug, and the deeds of his sons.
Ragnars saga is a sequel of sorts to the Vǫlsunga saga, providing a link between the legendary figures of Sigurðr and Brynhildr and the historical events of the 9th to 11th centuries, as well as prestige to the Norwegian royal house by portraying Sigurðr as its ancestor.