Two entries with the name Aristes.
Aristes
Son of Salandres (Salandre of the Isles) and brother of Dinisordres, Menastide, Nastor, and Gogonne.
Perceval defeated the whole family and sent them to Arthur’s court as prisoners.
Source
Perlesvaus | Early 13th century
Aristes
This son of Arthur features in the Icelandic Möttuls Saga.
His wife was proven unfaithful – along with all the other ladies at court – by an enchanted mantle.
See also
Chastity Test | The Legend of King Arthur
Source
Third Continuation of Chrétien’s Perceval | c. 1230