Arnauld, Arnault, Ernol, Ernols, Ernous, Erveus, Hernol, Hernols, Hernoul, Hernous, Orea, Oria
His three sons raped and murdered his daughter, then threw him in prison when he tried to punish them. The castle gained a reputation for murder and lechery.
It was visited by Galahad, Perceval, and Bors during the Grail Quest; they slew the sons and liberated Ernol (Hernox) from prison. Ernol, who had been granted a vision of the liberation, died in Galahad’s arms after bidding a hermit to warn Arthur of Lancelot and Guenevere’s treason.