Jon Umber (the Greatjon)

Lord Jon Umber, commonly called "the Greatjon" due to his large size, was the Lord of Last Hearth, the head of House Umber, and a formidable and proud bannerman of House Stark. He fought for Robb Stark in the War of the Five Kings. His role as Robb's chief northern advisor is taken up by Lord Roose Bolton. Despite sometimes standing up against Robb when disagreeing with his decisions, he is fiercely loyal to the Starks of Winterfell, and is in fact the first lord to propose crowning Robb the King in the North.