Mother of Gawaine, Mordred, Gareth, Gaheris, and Agravain in Arthour and Merlin (a thirteenth-century English poem) and in Tennyson’s Idylls of the King. She was the daughter of Hoel or Gorlois and Igerne (Igraine), and the wife of King Lot of Orkney.
A number of other sources name the same character as Morgause, though unlike her counterpart, Belisent is generally portrayed as Arthur’s kind and loving sister.
Arthour and Merlin | Late 13th century
Idylls of the King | Lord Alfred Tennyson, 1859-1886