Heoroweard

Several sources mention that he was married to Skuld, who according to Angrim's summary of the lost Skjöldunga saga was the daughter of Aðils the Swedish king (called Eadgils in Beowulf).

Beowulf, in the act of giving to his lord Hygelac the armor of Heorogar (which Hrothgar had given to Beowulf as a reward), repeats what Hrothgar told him: "No sooner would Heorogar give it to his son, valiant Heoroweard, though he was true to him..." He did not survive long after Hrólfs death.

According to Hrólf Kraki's saga, Skuld inherited the kingdom but was killed by the Geatish king Thorir Houndsfoot and by Yrsa's men.

In the Chronicon Lethrense, it is Haki, son of Hamund, who became the king of Denmark, but the other sources who mention him place him centuries earlier.

This is why Heoroweard is easily made jarl of Swedes, as in Saxo's patriotic tradition Swedish rulers are frequently appointed and dethroned.

In Arngrímur's Icelandic tradition, which had a more clear conception of the Swedish line of kings, Heoroweard could not be made ruler of Sweden, and so he was named as the ruler of a kingdom on the fringe of Sweden, Öland, a kingdom which was known to be independent, but whose line of kings was no longer known.

If both Snorri and Olrik are right, the Swedish king who supported Hereoweard when attacking and killing Hrólf may not have been Adils, but Östen.