Originally Posted By: tfabris
So you're saying that the showrunners didn't make that up, that it's something GRRM had planned and just hasn't put to paper yet?

Supposedly yes.

“We had this meeting with George Martin where we’re trying to get as much information as possible out of him, and probably the most shocking revelation he had for us was when he told us the origin of Hodor and how that name came about. I just remember Dan and I looking at each other when he said that and just being like, ‘Holy s–t.'”