Snorri Sturluson relates that when Jorund was young he used to travel the seas and plunder with his brother Erik, and they were great warriors.
Snorri then cites the poem Háleygjatal by a Norwegian skald named Eyvindr skáldaspillir: This act rendered the Swedish princes, Eric and Jorund, even more famous and they were thought of as even greater men.
They anchored in Oddesund (before a storm in 1825, it was near the innermost part of the fjord and almost 200 km from its mouth) but were discovered by the Norwegian pirate Gylaug of Hålogaland, the son of Gudlaug.
Snorri illustrates this event with the stanza from Ynglingatal: The Historia Norwegiæ presents a Latin summary of Ynglingatal, older than Snorri's quotation, continuing after Yngvi (called Ingialdr): Post hunc filius ejus Jorundr, qui cum Danos debellasset, ab eisdem suspensus in loco Oddasund in sinu quodam Daciæ, quem Limafiorth indiginæ appellant, male vitam finivit.
Iste genuit Auchun (i.e. Aun) [...][6] After him his son Jorund ruled, who ended his days unhappily once he had fought a war against the Danes, who hanged him at Oddesund, on an arm of the sea in Denmark which the natives call Limfjorden.
[8] The Skjöldunga saga and the Bjarkarímur tell that Jorund was defeated by the Danish king Fróði (corresponds to the Heaðobard Froda in Beowulf), who made him a tributary and took his daughter.