Do you think that J.R.R. Tolkien knew of the idea of?
I’m sure he “knew of” the ideas you mention, since they were very popular until about the 1950’s. He was, after all, a university professor of Anglo Saxon and ancient English, so these ideas would be there. However, I don’t know how far you can go in speculating what his work “means”. I do know that if you’ve read Beowulf, most of The Hobbit reads like plagiarism.