Ποιος παντρεύτηκε το Beatrice of Montferrat;

Beatrice of Montferrat (c.1210 – 1274) was an Italian noblewoman, the eldest daughter of William VI, Marquess of Montferrat, and the third wife of Guigues VI of Viennois, by whom she had two sons. According to the vida of the troubadour Gauseran de Saint-Leidier, Beatrice was the domna (lady), whom he allegedly loved. He celebrated his idealised devotion to her in his cansos.