An enemy of Gawaine in the first Perceval continuation.He accused Gawaine of killing his father. After an indecisive duel in the forest, they agreed to postpone their combat until they met at a court. They encountered each other at the castle of Escavalon, where Gawaine was already slated to fight a knight named Guigambresil.
The King of Escavalon decreed that Gawaine would have to fight Dinasdarés and Guigambresil together, but Arthur intervened and stopped the battle, and Gawaine and Dinasdarés made peace.
Dinasdarés married the lady Beatris, the niece of the King of Escavalon.