William of Joigny (c. 1160- 15 Feb 1220) (1200–1220) Parents Adèle de Nevers Rainald IV of Joigny Children Peter of Joigny Guillaume II de Joigny Blanche of Joigny Siblings Agnes van Broyes Commercy Gaucher de Joigny Hélisende de Joigny Partners Béatrix de Sancerre Alice of Courtenay