 Odo was the son of Stephen II of Troyes and Meaux, and Adele.He was still a minor at the death of his father, and his uncle Theobald III of Blois acted as regent of Troyes.In 1060, Odo married Adelaide of Normandy, daughter of Robert I, Duke of Normandy and widow of Enguerrand II, Count of Ponthieu, Lord of Aumale and Lambert II, Count of Lens.