Ned Stark's bastard son, Jon was raised at Winterfell on near-equal footing with his siblings. He joined the Night's Watch where he serves as steward to the Lord Commander. Despite his instincts to join Robb in battle, he honored his vows to the Watch. His direwolf is named Ghost.
"A bastard boy with nothing to inherit,
off to serve in the ancient order
of the Night's Watch." — Tyrion Lannister