Lancelot, imprisoned by Meleagant, learned that Queen Guinevere would be at the tournament. He convinced one of Meleagant’s servants to let him out of the prison – with the promise that he would return to the prison when the tournament was over. Lancelot won the tournament, to the delight of Guinevere, and kept his promise to return.
I should assume Noauz to be composed of castle, town, and the lands thereto pertaining, and to lie within reasonable traveling distance of Gore. Also because of the name similarity, I should not be surprised if Noauz and Nohaut were the same territory.
Lancelot, or Le Chevalier de la Charrete | Chrétien de Troyes, late 12th century