Robert married Isabeau Crespin Abt 1200. Isabeau (daughter of Guillaume Crespin and Ève d'Harcourt) was born Abt 1180. [Group Sheet]
Isabeau married Robert II de Poissy Abt 1220. Robert (son of Robert de Poissy and Luce Le Chambellan) was born Aft 1190; died 1222. [Group Sheet]
Guillaume married Isabelle de Lévis 1243. Isabelle (daughter of Simon de Lévis and Pérronelle de Poivilliers) was born Abt 1220; died Nov 1245. [Group Sheet]
Robert married Isabelle de Marly 1261. Isabelle (daughter of Bouchard II de Marly and Agnès de Beaumont-Gâtinais) was born Abt 1245; died 3 Sep 1292; was buried 4 Sep 1292. [Group Sheet]