Brandon Stark was the second son of Lord Eddard Stark and Catelyn Tully. He became crippled after being pushed from a tower in Winterfell by Jaime Lannister. He was constantly accompanied by a direwolf he named summer.
During the War of the Five Kings Brandon Stark suddenly departed Winterfell, just as the Ironborn Invasion of the North was commencing. House Stark would send many search parties out for him during the years, but like his uncle, Benjen Stark, he seemingly just vanished. Some say he went beyond the wall, some say he was captured by the Ironborn, however no one really knows the truth.