One of the things that fascinates me about the Arthurian canon is not just the weirdness of what’s in it, but the number of things that are left out of it. We can’t tell from this distance whether these holes in the narrative have always been there–it’s easy to imagine an oral tradition that was at one point common knowledge going out of fashion, or failing to be transmitted to a new population, so that what eventually got written down was missing things that at one point previous, everyone just knew.
Enter – and quickly exit – Sir Borre.
…There came a damosel that was an earl’s daughter: his name was Sanam, and her name was Lionors, a passing fair damosel; and so she came thither for to do homage, as other lords did after the great battle. And King Arthur set his love greatly upon her, and so did she upon him, and the king had ado with her, and gat on her a child: his name was Borre, that was after a good knight, and of the Table Round.
–Malory, Thomas. Le Morte d’Arthur (p. 18). Neeland Media LLC. Kindle Edition.