🧐 Fascinating... according to the Latin Arthurian 12th century text "Draco Normannicus" by Étienne de Rouen, the following is said:
Mordred's sons are twins.
Morgan is identified as Arthur's sister (for the first time).
Arthur becomes immortal after he's healed from his wounds by his sister, Morgan.
References
Of Rouen, S. (1169). Normannicus Draco. Latin Arthurian Literature. https://www.asnc.cam.ac.uk/research/latin-arthur/texts/the-norman-dragon-banner/















