[Kransha]

As I mentioned in my post script, I do not know the source of that speculation, though it seemed respectable enough. Perhaps it was from a letter or transcript of his. Luckily, I was specific enough not to present that statement as fact, since it is speculation. I do have the other two sources, but they are not Tolkein and I don't know what those sources' sources are. Perhaps I can find that out.

So, werewolves were not directly Maiar, but they may have had maia spirits as a kind of "soul fuel" or however one would put it. Vampires are more likely candidates for the position of maiar than werewolves, but it is still more or less speculation. Similar to the Ungoliant theory.