They were once again reborn as Helgi Haddingjaskati and Kára whose story survives as a part of the Hrómundar saga Gripssonar.
Helgi appears to be the son of Sigmund and Borghild, and only fifteen years old he avenges his father by slaying Hunding, the king of the Saxons.
Sigrún bids an angry farewell to the dying Hothbrodd and cries with happiness when she learns that her whole family is dead but Dag, who swears allegiance to Helgi.
Then he goes to Sigrún to give his condolences, which makes her curse him: She tells Dag to flee into the woods and to thenceforth live on carrion.
Helgi gladly obeys and orders Hunding to feed the pigs, to wash the einherjars' feet and to do other menial chores.
In the second verse of Helgakviða Hundingsbana I[1] we learn that the norns weave the destiny of Helgi, son of Borghild, called Great of Heart (Hugumstóri), that he will become the best of the Budlungs, the clan who bore Attila the Hun (Atlí) and Brunhild.
[citation needed] The existence of a civil war may explain why Hjörvard was a sea-king, a man without roof, despite being described by Sögubrot as a former ruler of East Götaland.
Comments: There were four family branches: Granmar is listed as a Yngling sub-king who was invited by the Ingjald the Ill-ruler as it is also stated that Sweden was divided between Erik and Alrik.
Granmar seems to have had an agenda in uniting the branches of the Ylfings, as he was distrustful of his kinsman Ingild Ill-ruler, who killed all the other kings of Yngling kin.
Hjörmund was later given the kingdom of his father Hjörvard by Harold Hildetand, thus ending all internal strife.
have remarked that, in the Norse sagas the Ylfings are never called Danish, and the only territory that they are said to have ruled is East Götaland.
In the first poem (Helgakviða Hundingsbana I), Sinfjotle has his residence on the Bravellir (the plain west of Bråviken in East Götaland, see Battle of Bråvalla) and Helgi resides at Hringstaðir (probably modern Ringstad, an old royal estate on the same plain existing well before, and during, the 7th century).
Moreover, in the Heimskringla, their enemy Granmar (the father of Hothbrodd) was the king of Södermanland, which is adjacent to East Götaland, and not of Sweden.
From there, they moved west: […] out of the East / have the Ylfings come,Greedy for battle, / to Gnipalund.Westwards from the Stralsund is indeed the mouth of the river Warnow, and the town of Schwerin.