Background
In 1310, he married Margaret of Valois, daughter of Charles of Valois and sister of Philip VI of France.
Duke of Lorraine Duchess of Brittany
In 1310, he married Margaret of Valois, daughter of Charles of Valois and sister of Philip VI of France.
They had three children:
Louis I of Châtillon (d 1346)
Charles of Blois (d 1364) - would marry Joanna, Duchess of Brittany. Charles and the French would engage in the Breton War of Succession against the House of Montfort and the English
Marie, married in 1334 Rudolph, Duke of Lorraine (d 1346), married secondly Frederick VII, Count of Leiningen-Dagsburg.