Two entries with the name Ares.
Ares
Arec, Arel, Arels, Aret, Areta, Areth, Aretha, Aries, Thares
One of Arthur’s various kings; the father or foster-father of Arthur’s knight Tor. In early French romance, he is the king of Autice, and Tor is, in fact, his son.
The Post-Vulgate Merlin continuation, alternatively gives him as poor cowherd who arrived at Camelot on the day of Arthur’s wedding and asked Arthur to knight his estranged son, Tor. Arthur complied, and it was later discovered that Tor was in fact the son of King Pellinore by Ares’ wife before they married.
Sources
Erec | Chrétien de Troyes, late 12th century
Erex Saga | 13th century
Yder | Early 13th century
Lancelot do Lac | 1215-1220
Vulgate Lancelot | 1215-1230
Post-Vulgate Suite du Merlin | 1230-1240
Le Morte Darthur | Sir Thomas Malory, 1469-1470
Ares
Father of Do and the grandfather of Griflet and Lorete.
Source
Prose Tristan | 1230-1240