Acoriondes
He’s one of Alexander’s twelve companions, who accompanied him to Britain from Greece. Arthur knighted them all at the outset of Count Angrs’ rebellion.
Acorionde survived the rebellion and returned to Greece with Alexander. When they landed at Athens, Acorionde was the man who took Alis’, crowned emperor by mistake, word that Alexander had arrived ready to fight for his throne.
Source
Cligés | Chrétien de Troyes, late 12th century