Hoid is a mystery which I cannot speak on other than what has been written in the text of the novels.
Mostly this is for you to piece together. As I said before, this is a story I’m telling, and if I have to explain the story outside the story, then in some ways I’ve done something wrong. So let the story speak for itself, and you will see. I guess that’s a RAFO (Read And Find Out).
Check my forums or one of my fan websites. (The Seventeenth Shard, Coppermind Wiki etc.) There are many people there who have info/guesses/thoughts about Hoid. I have been, and will remain to be, closed lipped on the subject.)