The alias of Sir Persaunt (Persant), a knight defeated by Gareth in Malory.
In Tennyson, he calls himself “The Son of the Morning Star”.
See also
Colored Characters | The Legend of King Arthur
Sources
Le Morte Darthur | Sir Thomas Malory, 1469-1470
Idylls of the King | Lord Alfred Tennyson, 1859-1886