Background
He was the son of Guy III, Count of Saint-Political and Matilda of Brabant. In 1292, he married Marie of Brittany, daughter of John II, Duke of Brittany and Beatrice of England.
He was the son of Guy III, Count of Saint-Political and Matilda of Brabant. In 1292, he married Marie of Brittany, daughter of John II, Duke of Brittany and Beatrice of England.
They had eight children:
John, Count of Saint-Political (d 1344), married Joanna, daughter of John I of Fiennes
Jacques of Châtillon (dsp 1365), Lord of Ancre
Mahaut of Châtillon (1293–1358), married Charles of Valois
Beatrix of Châtillon, married in 1315 Jean de Dampierre, Lord of Crèvecœur
Isabeau of Châtillon (d May 19, 1360), married in May 1311 William I de Coucy, Lord of Coucy
Marie of Châtillon, married Aymer de Valence, 2nd Earl of Pembroke
Eleanor of Châtillon, married Jean III Malet, Lord of Graville
Jeanne of Châtillon, married Miles de Noyers, Lord of Maisy
He held the office of Grand Butler of France. He was placed in joint command (with Robert VI of Auvergne) of one of the two reserve "battles" of the French troops at the Battle of the Golden Spurs.