Well, ‘Hoid’ the name is an alias that a certain person is using, and he stole it from someone else.
But the person named Hoid in Elantris, Mistborn, and Warbreaker are all the same individual. For the record, this is not a ‘name cameo.’ This is, indeed, the very same person.
I’ve probably said too much already. Now, perhaps what people should asking me is this: What has Hoid been up to in all of these books? Or, maybe you shouldn’t ask me, as I wouldn’t be likely to answer (There are clues in the novels, however). No, he’s not just hanging out. Yes, I know what he’s been doing. Will I write his scenes some day? Maybe. We’ll see. There may be short stories posted on my website.