Agnès of Montfaucon (1150-1200) (1150–1200) Parents Béatrice de Joinville Amadeus II of Montfaucon Children John of Brienne Ida de Brienne William of Brienne Andre de Brienne Walter III, Count of Brienne Siblings Richard III, Count of Montbéliard Wouter I van Montfaucon Alix de Montfaucon Partners Erard II, Count of Brienne