Along with his brother Peter, Duke of Brittany he fought with the future Louis VIII of France in 1212 at Nantes and was captured there during a sortie. He was exchanged after the Battle of Bouvines for William Longsword, Earl of Salisbury, he fought in the Albigensian Crusade, besieging Avignon in 1226. He was a supporter of Blanche of Castile during her regency after the death of Louis VIII in 1226.
In 1210 he married Annora of Saint-Valéry and they had several children:
Yolande of Dreux (1212–1248), who married Hugh IV, Duke of Burgundy
John I (1215–1249), later Count of Dreux.
Robert (1217–1264), Viscount of Châteaudun.
Peter (1220–1250), a cleric
Along with his brother Peter, Duke of Brittany he fought with the future Louis VIII of France in 1212 at Nantes and was captured there during a sortie. He was exchanged after the Battle of Bouvines for William Longsword, Earl of Salisbury, he fought in the Albigensian Crusade, besieging Avignon in 1226. He was a supporter of Blanche of Castile during her regency after the death of Louis VIII in 1226.
In 1210 he married Annora of Saint-Valéry and they had several children:
Yolande of Dreux (1212–1248), who married Hugh IV, Duke of Burgundy
John I (1215–1249), later Count of Dreux.
Robert (1217–1264), Viscount of Châteaudun.
Peter (1220–1250), a cleric
Family Members
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