If you go far enough down the Psmiths' online rabbit hole, you'll find (via footnote 7) some speculation on that. Tolkien was apparently of the opinion that the Norman Conquest was a Very Bad Thing for English historical language and culture, hence his frequent references and allusions to Anglo-Saxon mythology. It sounds like he would have been a fan of The Wake as described here.
That was my thought as well, and it's an interesting thought exercise, but unless there is some note on this which I'm not aware of, it's just reasoned speculation.