[1] There were probably four stewards in the royal household, and Henry kept in office the three he inherited from his brother King William II, namely Eudo, Haimo and Roger Bigod, 1st Earl of Norfolk.
[4] In March 1101 William served as a surety for Henry fulfilling a treaty with Robert II, Count of Flanders.
William pledged 100 marks as security that would have been forfeited should the king fail to uphold the treaty terms.
[8] William married Emma de Falaise, the daughter and heiress of William de Falaise, feudal baron of Stoke (later "Stoke Curcy, Stogursey") in Somerset, who held amongst many others, the manor of Stogursey in Somerset, his caput, at the time of the Domesday Book in 1086.
[10] By his wife he had three sons:[1] William de Courcy (died before 1130), eldest son and heir who inherited the feudal barony of Stogursey,[9] Richard, and Robert de Courcy, who may have inherited his father's royal stewardship.