Hrolfr Kraki, Hrodulf, Rolfo, Roluo, Rolf Krage (early 6th century) was a legendary Danish king who appears in both Anglo-Saxon and Scandinavian tradition. His name would in his own language (Proto-Norse) have been *Hrothiwulfaz (famous wolf). Both traditions describe him as a Danish Scylding, the nephew of Hrodgar and the grandson of Healfdene. The consensus view is that Anglo-Saxon and Scandinavian traditions describe the same people.
Beowulf and Bjarki
The standard view is that, if Beowulf himself has a 'cognate' character in Rolf Kraki's story, it is Bodvar Bjarki (Bodvar Biarke), who also has a younger companion, Hjalti (Hialte) - perhaps matching the Beowulf character Wiglaf. Beowulf comes from Geatland (= Gotaland) and one of Bodvar Bjarki's elder brothers, Thorir, becomes a king of Gotaland. Moreover, like Beowulf, Bodvar Bjarki arrives in Denmark from Gotaland (Geatland), and upon arriving in Denmark he kills a beast that has been ravaging the Danish court for two years. The monster in Hrolf Kraki's saga, however, is quite unlike the Grendel of Beowulf; but it does have characteristics of a more typical dragon, a creature which appears later in Beowulf. Just as Beowulf and Wiglaf slay a dragon at the end of Beowulf, Bodvar Bjarki and Hjalti help each other slay the creature in Denmark.  Proponents of this theory, like J. R. R. Tolkien, argue that both the names Beowulf (lit. "bee-wolf", a kenning for "bear") and Bjarki are associated with bears. Bodvar Bjarki is constantly associated with bears, his father actually being one.  In some of the Hrolf Kraki material, Bodvar Bjarki aids Adils in defeating Adils' uncle Ali, in the Battle on the Ice of Lake Vanern. In Beowulf, the hero Beowulf aids Eadgils in Eadgils' war against Onela. As far as this Swedish adventure is concerned, Beowulf and Bodvar Bjarki are one and the same. This match supports the hypothesis that the adventure with the dragon is also originally derived from the same story.

Q: Where is beowolf from?
A: Beowulf comes from Geatland (= Gotaland)

Q: What does Beowolf do?
A: the hero Beowulf aids Eadgils in Eadgils' war against Onela.

Q: What does beowulf mean?
A: Beowulf (lit. "bee-wolf", a kenning for "bear")

Q: Do Beowulf and Bjarki have anything in common?
A: both the names Beowulf (lit. "bee-wolf", a kenning for "bear") and Bjarki are associated with bears.

Q: What else is similar?
A: Bodvar Bjarki aids Adils in defeating Adils' uncle Ali, in the Battle on the Ice of Lake Vanern. In Beowulf, the hero Beowulf aids Eadgils in Eadgils' war against Onela.
Are there any other interesting aspects about this article?
As far as this Swedish adventure is concerned, Beowulf and Bodvar Bjarki are one and the same.
As far as this Swedish adventure is concerned, Beowulf and Bodvar Bjarki are one and the same.