Sure. But I think it's very fair to say that Irish fairies are far older than any recorded Germanic tradition of elves.Celtic fairies and Welsh fairies aren't necessarily the same thing - it does seem that fairies are not traditionally a significant part of Welsh tradition as they are in England, judged by such evidence as landmarks named for them, or regional differences in belief that suggest a long local history of divergence and are all but absent in documented tales from Wales. This of course carries the caveat that this is what we have from documented interviews since folklorists started collecting stories, which is a pretty short period by the standards of folklore. Local fairies with older origins could certainly have been supplanted by English ones if there was no strong cultural attachment to them.
I can't say I agree. I will say that the only flaw I can find in Tolkien, whom otherwise I regard as having a sacredness just below Scripture, is that it feels strange that his world is so empty of religion. However, I don't think creating a Christian mythology is in any way strange. He wasn't trying to found a new sect of neo-paganism.That does rather run against the point of creating a mythology for the English - their Christian-era beliefs are relatively well-documented. Snorri Sturluson was a Christian but what we know of Norse mythology, outside some references to practices in the sagas (themselves Christian-era retellings of oral traditions), is almost entirely drawn from his codification and retelling of stories that may have been treated very differently by the people who actually believed them or told them on a day-to-day basis.
Irish mythology is old. It was written down by monks, yes, but it remarkably retained its pagan nature. Yes, Sidhe is vague; Tuatha De Danann is not.Again, that presumes a continuity to the presentation of these entities that isn't really there in folklore, at least as far back as we can go. 'Sidhe' is just the Irish word for 'fairy' and is understood to include a class of folklore creatures as varied as the English word.
Worth noting that Tolkien absolutely detested those.The Victorian creation of small winged beings with a penchant for flowers has nothing to do with English folklore
Not off the top of my head--I'm thinking it was a Brythonic source--but if I find it I'll let you know. I think I ran across it when I was doing research for a paper on Sir Gawain and the Green Knight.Do you know of specific sources for this? I always imagined they had an older existence than Tolkien but haven't found anything concrete when I've looked (admittedly not in great detail). There are talking trees, but not perambulating ones that I'm aware of. Treefolk seem to be one of those things that feel as though they should be part of a real, older folklore, along with some other of Tolkien's inventions - I recall when I was younger I imagined that Old Man Willow and the trolls in the cave from The Hobbit were actual stories from folklore adapted by Tolkien, but they seem to have been his creations.
If you don't have experience with literary criticism or Anglo-Saxon studies, you have no idea what a bold statement you just made. There are a number of theories about Beowulf: it was an oral story written down by a monk; it was a bit of historical fiction written by a monk; whether original or traditional, it was written by a pagan who had a knowledge of Christianity (if you're familiar with the tortuous history of Christianization in England, that's not so strange); among others. (For what it's worth, I believe you're correct, that it's a traditional story--or more than one--that was recorded by a Christian monk. But I'm not an expert, and the topic is still hotly controversial.)For example, the story of Beowulf, is a pre-christianized english story retold by a christian writer.