Ambrosius Aurelianus
Arthur's supposed uncle, Ambrosius Aurelianus is seen as a remnant of the old Roman ways trying to defend his homeland against what seems to be an unstoppable invasion of foreign barbarians. The book presents several other historical-mythical figures such as Hengist and Horsa, the Saxon chiefs who invade England and Vortigern, king of Britons. Brother Ninnias could be a version of the monk Nennius, who is traditionally considered to have authored Historia Brittonum.