Seleyses, Selises, Selyses
When Lancelot and Guenevere were accused of treason, Celices pledged his support to Lancelot and helped him to rescue Guenevere from the stake. He fought alongside Lancelot when Arthur laid siege to Joyous Guard and, later, Benoic (Benwick).
In return for his support, Lancelot made him the Earl of Marsan.
Palamedes | c. 1240
Prose Tristan | 1230-1240,
Le Morte Darthur | Sir Thomas Malory, 1469-1470