: Norse and Germanic mythologies were very closely related, and shared some of the same gods. Ragnarok is recorded only in Norse writings (Icelandic), but before the 7th, 8th centuries the Anglo-Saxons and the Scandinavians spoke essentially the same language and shared much the same poetic traditions.

: "Beowulf" is incorrectly called an Anglo-Saxon poem. It survives only in an Anglo-Saxon manuscript, but the story is not about Angles or Saxons -- it's about Danes and Geats (Scandinavians) and would have been heard throughout the northern world when it was popular (essentially what are now Denmark, Norway, Sweden, England, and Germany, perhaps also France).

: Some of the other Anglo-Saxon poems reflect this multinational tradition of the ancient world, such as "Widsith". The northern peoples travelled freely throughout the lands, exchanging stories, traditions, and ideas along with trade and war.

I know this, but we do not know whether they traded religion as well, nor when the socalled Norse Gods (aserne) pushed the old excisting ones (Vanerne) from the seat of power and merged with them.
BTW, try see if you can get hold of a translation of Saxo Grammaticus' Gesta Danorum, its chapters dealing with what we can see is the late Iron Age are great- especially the story of the last battle of Rolf Krake and his berserkers.
BTW II, one of Charlemagne's most famous knights was a Dane called Holger the Dane, now guarding Denmark against evil in the cellars of Amalienborg (residence of the Royal family), typical medieval trend.
Neithan Turambar