With the exception of the Ynglinga tál all these records are quite
late, hence they do not afford any evidence for the dates of events
mentioned in Beowulf.
Further Scandinavian correspondences are seen in Böthvarr Biarki,
the chief of Hrölf Kraki's knights. He is supposed to correspond to
Beowulf. He came to Leire, the Danish royal residence, and killed a
demon in animal form. Saxo says it was a bear. This demon attacked
the King's yard at Yule-tide, but Biarki and Beowulf differ as to
their future, for Biarki stayed with Hrölf Kraki to the end and died
with him.
In the Grettis Saga the hero kills two demons, male and female. It is
true that the scene is laid in Iceland, but minor details of scenery,
the character of the demons, and other similarities make it impossible
to believe the two stories to be different in origin. They both
sprang out of a folk-tale associated after ten centuries with Grettis,
and in England and Denmark with an historical prince of the Geats.