Hálfdanar saga Brönufóstra to his father's kingdom and defeats and kills Soti and his Vikings. Although numerous sagas contain analogs to the iconic cave battle with Grendel and his mother in "Beowulf," none is closer to the Old English epic than is Hálfdan’s cave battle with Járnnefr and his wife. The saga is found in three, 15th-century vellum manuscripts, but its post-medieval popularity is evidenced by its preservation in over four dozen paper manuscripts. In the 18th century it served as the source for the first known saga forgery. "Hálfdanar saga Brönufóstra" has a sequel in "Sörla saga sterka", where it becomes clear
Harald the Old Harald the Old Harald Valdarsson, also known as Harald the Old (, born circa 568) appears only by name in "Hversu Noregr byggðist", but his father, sons and their descendants played a central role in the politics of Scandinavian legends. "Hversu Noregr byggðist" tells that he was the son of Valdar, who was the son of Hróarr (i.e. king Hroðgar of "Beowulf"), and Harald was the father of Halfdan the Valiant and the grandfather of Ivar Vidfamne. "Skjöldunga saga" tells that the same Valdar (i.e. Harald's father) disputed that Rörek, the cousin of Hróarr (Hroðgar) should succeed Hrólfr Kraki (Hroðulf)