John of Brienne King of Jerusalem and Emperor of Latin Empire of Constantinople (c.1170-1237) (1158–1237) Parents Agnès of Montfaucon Erard II, Count of Brienne Children Marie of Brienne John II of Brienne Louis of Brienne Alphonso of Brienne Isabella II of Jerusalem Siblings William of Brienne Walter III, Count of Brienne Ida de Brienne Andre de Brienne Partners Maria of Montferrat Berengaria of León Stephanie of Armenia