Pendragon or Pen Draig, meaning "head dragon" or "chief dragon" (referring to a battle standard), is the name of several traditional Kings of the Britons: Aurelius Ambrosius, son of Constantine II of Britain, called "Pendragon" in the Vulgate Cycle Uther, brother of Aurelius and father of King Arthur, is called Uther Pendragon because he was inspired by a dragon-shaped comet (In the Vulgate, he took the name from his brother) King Arthur, son of Uther"Pendrago