Bran Stark son of lord of Winterfell, Ned Stark. Bran was a name which Eddard Stark named his son after his brother.
Bran became cripled at the end of the first season of this series- Game of Thrones. The reason of being cripled was that he was thrown from a big tower in winterfell when he saw Jaime Lannister and Cersie Lannister(Two twin brother and sister) together, up above in tower.
Bran started having vision of three-eyed raven as soon as he got up from his sick bed. He then marches to beyond the wall to meet the three-eyed raven finally being a three-eyed raven himself, later. Bran is assumes to play a big role in the war to come in order to defeat the Night King.
At the last episode, of GOT7 he is seen citing the real identity to Sam Tarly during which he finds out that Jon Snow never was a bastard Instead, Jon's real name was Aegon Targaryen, the son of Rhaegar Targaryen and his aunt Lyanna Stark, the heir to the Iron throne.