Quote Originally Posted by War Machine Dawg View Post
Ho. Lee. Shit. I've never thought of that angle. We all assume that Jon was an only child and Lyanna forced Ned to raise Jon as his own, because she knew Robert would kill any child of Rhaegar's, even if it was her child as well. But who the hell would a twin be? Certainly not Dany. It's very much established she's Rhaegar's sister. And there's no one floating around with any of the classic Stark physical features that seems to be important. You also would have to assume Howland Reed took the other kid and dropped it off with a different noble family. But there's no hint of an unexplained adoption or bastard for the important houses, other than Jon. We need Bear to weigh in on this theory. It's making my mind hurt.
The popular twin theory is that it is Meera. Ned takes one kid and Howland Reed the other.