Iserterre
In Wolfram’s Parzival the land of King Clamadeu, foe of Condwiramurs of Brobarz (Kondviramur). Clamadeu was forced to abandon Iseterre when he was defeated by Perceval and sent to Arthur’s court for his penance.
In the Pleier’s Garel, Iseterre is ruled by King Angenis.
Sources
Parzival | Wolfram von Eschenbach, 1200–1210
Garel von dem blühenden Tal | Der Pleier, 1240-1270