In Celtic mythology, Guinevere or Guinevere, is the French spelling of the Celtic name Gwynhwfar (' white cloud') . Gwynhwfar was a cloud-goddess who often, for mischief, took mortal form and entered the world of humans to cause havoc. Soon after Arthur became king of Camelot, she entered the womb of a Roman princess whose husband ruled in Britain, and was born, as a beautiful mortal: Guinevere. In due course Arthur married her, against the advice of Merlin. Guinevere was the most beautiful woman in the world, and all Arthur's knights would have had sex with her if they hadn't been bound by their oaths of chivalry. Only Lancelot succumbed, and his and Guinevere's adultery broke Arthur's heart and led to the end of Camelot. When the company of the Round Table was broken up and its heroes disappeared into legend, Guinevere resumed her identity as Gwynhwfar, returned to the sky and has ever since been planning her next earthly manifestation. Research Guinevere