Steven, Odin is actually a much more interesting problem than Adam. I think so, anyway. There are no proofs to connect anyone now living to anyone in the Bible, so it's very easy. It's all fake.
But, with Odin, there is no real, reasonable, academic place to cut the lines. You just go back and back. This guy is real. His father is real. There's no reason to think his grandfather isn't real. But wait. Suddenly you're in the midst of a bunch of gods who you (the generic you) don't think can possibly be real. And there are giants and elves everywhere you look. Something has gone wrong somewhere and there's no way to know where that happened.