Warden

Warden is a title bestowed upon the head of a noble house by the king of the seven kingdoms.

Wardens of the Seven Kingdoms

 * Eddard Stark, Warden of the North.
 * Tywin Lannister, Warden of the West.
 * Robin Arryn, Warden of the East.
 * Mace Tyrell, Warden of the South.