How much did the Nordic cultures influence Tolkien's writings about the Rohirrm? Here are two points of view:
Yes!
No!
Music In Middle Earth:
What was the role of music in Middle Earth? What would it have probably sounded like?
The Manly Men of Myth and Middle Earth:
How much were Tolkien's heroes like the heroes of the ancient Greeks, Hebrews, and Germans? Did Beowulf really serve as a model for any of Middle-earth's men of action? Tolkien is believed to have revived some of the ancient epic traditions, but his heroes display a surprising humility when compared to classic examples.
The Merchants of Middle Earth:
A look at Middle Earth economy and trade.
Ferthu Theoden Hal!
If you've ever wondered what was so special about Theoden, there may be an answer to your question. We can study the world in which Theoden lived to learn a little more about him.
Death and Funerary Customs in Middle Earth