Game of Thrones season 4

Apparently the characters name was spoiled in a synopsis on the HBO site, then quickly taken down. I haven't heard it yet though.

Since G.R.R Martin spilled the rest of the story to the creators of the show, a lot of people think that scene is one that will show up in The Winds of Winter, so I guess even book readers are going to be surprised from this point on.

Yeah, it was in the Synopsis that was originally on HBO's site. It was all over Reddit for a while. It mentions said character by name, leaving no doubt really.