Brinesent, Hermesan, Hermesent, Hermesente
Arthur’s sister in the Vulgate Merlin.
The daughter of Hoel and Igerne (Igraine), she married King Urien (Uriens) and had a son named Yvain (Ywaine). Her sister was called Blasine. She encouraged her son to take service with Arthur.
Her role is assumed by Morgan le Fay in the Post-Vulgate.
Sources
Vulgate Merlin | 1220-1235
Arthour and Merlin | Late 13th century