In his Livres dou Tresor, Brunetto Latini recites the canonical list of strong or wise men famously deceived by women. There is ‘David le prophete, ki por la beauté Bersabee fist meurtre et avoutire’ [David the prophet, who was driven by Bathsheba's beauty to commit murder and adultery], ‘Salemons, ses fils’ [Solomon, his son] who was induced by his wives to worship false idols, and Samson, who, due to a woman's betrayal, ‘perdi puis la force et la vertu et la vie’ [lost his strength, his virtue, and his life]. Within this survey of classical and Biblical victims of love, we find a familiar name:

The list derives from classical rhetoric and Patristic writing, and was circulated throughout the Middle Ages in the form of exempla demonstrating the destructive power of sexual love. As the collection absorbed characters from popular stories and legends, Aristotle, Virgil, and Merlin were added to the repertoire. The story of Merlin's demise at the hands of the Dame du Lac is even more controversial than the story of his birth, but all French and Italian versions agree on a number of details: Merlin falls in love with the Dame du Lac, who is not a fairy or supernatural being, but a precociously clever lady. She promises Merlin her love in exchange for lessons in magic, and then uses that magic to confine Merlin to a cave, a tomb, or – in the Vulgate Cycle – a magic castle, causing him to withdraw from the main action of the narrative. After this, Merlin either becomes completely absent, or continues to prophesy from inside his tomb, but only to the chosen few who are able to find him.