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. After the death of Enguerrand's only daughter Adelaide, her mother Adelaide of Normandy became her heir and hence through his marriage Odo acquired the title Count (or Earl) of Aumale in
Normandy Jure uxoris (by right of his wife). Adelaide (sometime called Adeliza) was also sister of
William the Conqueror, and Odo accompanied his brother-in-law in the
Norman conquest of England (1066).
Theobald III of Blois then seized Odo's counties in the
Champagne region, One version states William I, for his services in the conquest gave Odo
Holderness in
Yorkshire. Another proposes that the
Lordship of Holderness was granted to William's sister Adelaide, in 1087, and Odo became Earl of Holderness by right of his wife. Odo was, with
Alan Rufus and
Roger of Poitou, one of the commanders of the army sent by King
William II to besiege
William de St-Calais at
Durham Castle after the
Rebellion of 1088, and who signed St-Calais's guarantee of personal safety. Odo was implicated in a plot to place his son
Stephen of Aumale on the English throne. Stephen was the first cousin of brothers
William Rufus, King of England and
Robert Curthose, Duke of Normandy. Stephen was apparently not put on trial himself as he may have been out of the king's reach in Normandy. Odo was imprisoned in 1095. Odo lost his English lands for his complicity but they were restored to Stephen two years after the death of William Rufus. ==Family==