Dragon Age: Ascension
In antiquity, teyrns arose from among the banns, having grown powerful enough to move lesser banns to swear fealty to them. There are only two teyrnirs in modern Ferelden: Gwaren in the south and Highever in the north. The teyrns of these teyrnirs are still owed fealty by arl and bann vassals, whom they may call upon in the event of war or disaster, but to whom they are also responsible for lending aid when needed.
The proper address is “your Grace,” a form imported by the Orlesians.