Jon Umber (Greatjon) ( Greatjon, Jon Umber )

Lord Jon Umber, better known as Greatjon Umber, to distinguish him from his son and heir, the Smalljon, is the head of House Umber, a loyal vassal family to the Starks of Winterfell. The Greatjon wields the “biggest, ugliest greatsword” that Bran has ever seen.