The Daynes have peculiar physical appearance. So funny that you should mention the possibility of a link between the candles and the old men in the hallway. The Daynes are light blonde hair and blue eyed. Dawn lit in Arthur's hands. I know it's Dany who is descended from those kings but that doesn't mean they don't have other descendants still around. I'm sold on the original poster's theory, Dany is the current Azor Ahai, and I also believe there will be other heroes who will have their own weapons against the ice walkers. Most of them will not become famous or get their names recorded in songs and stories but they will play important roles. This Dayne kid, Ned Dayne should be one of them. House Dayne could be related to the Opal king.