William FitzOsbern, 1st Earl of Hereford

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William FitzOsbern
Born Circa 1020
Died 22 February 1071
Cause of death
Known for
Parent(s) Osbern the Steward

William FitzOsbern (circa 1020 – 22 February 1071), Lord of Breteuil, in Normandy, was a relative and close counsellor of William the Conqueror and one of the great magnates of early Norman England. He was created Earl of Hereford before 22 February 1067, one of the first peerage titles in the English peerage.


William FitzOsbern was the son of Osbern the Steward, a nephew of Duchess Gunnor, the wife of Duke Richard I of Normandy. Osbern was the steward of his cousin Duke Robert I of Normandy.When Robert left the Duchy to his young son William, Osbern became one of Duke William's guardians. Osbern married Emma, a daughter of Count Rodolf of Ivry, who was a half-brother of Duke Richard I of Normandy. Through her he inherited a large property in central Normandy, including the honours of Pacy and Breteuil.

Early life[edit]

William FitzOsbern was probably raised at the court of his cousin and namesake Duke William, and like his father, became one of the ducal stewards. As a Norman nobleman, he founded Cormeilles Abbey and Lyre Abbey[1] (La Vieille-Lyre), and Saint-Evroul Abbey.[2]

He was one of the earliest and most vigorous advocates of the invasion of England, and tradition holds that he convinced the doubters amongst the Norman barons of the feasibility of the invasion. He is one of the very few proven Companions of William the Conqueror known to have fought at the Battle of Hastings in 1066.

FitzOsbern's younger brother Osbern was one of Edward the Confessor's chaplains, and possessed the rich church of Bosham in Sussex, and was well placed to pass along intelligence on the situation in England. He later became Bishop of Exeter.

In England after 1066[edit]

As Duke William took control of England (becoming William I of England), FitzOsbern was given charge of the Isle of Wight, and then before 22 February 1067 he was made Earl of Hereford as well as Gloucester, Worcester and Oxfordshire. That part of England was not yet fully under Norman control; the understanding must have been that FitzOsbern was to take charge of their conquest when he was able. In the summer of 1067 the King returned to Normandy, leaving FitzOsbern and Bishop Odo of Bayeux in charge of England in his absence. The King was back in England in 1068, and fitzOsbern accompanied him in the subjugation of southwest England. He attended the King's Whitsun court in May, and then himself paid a visit to Normandy, where he fell ill for some months.

In February or March 1069 FitzOsbern was asked by William to see to the peace in York (Gilbert de Ghent was made castellan of the new castle), but FitzOsbern returned south in time to attend the King's Easter court in April. Then he returned to York.

Anglo-Saxon resistance in the West Midlands was subdued later in 1069, and it is likely FitzOsbern played a major part in this, though the details are not certain. During this time FitzOsbern and his followers pushed on into Wales, beginning the conquest of the Welsh Kingdom of Gwent.

Castle builder[edit]

As part of the assertion of Norman control over England (and Wales), FitzOsbern was one of the major Norman castle builders. Early castles attributed to him include Carisbrooke on the Isle of Wight, in South Wales Chepstow (Striguil), Wigmore Castle, Clifford Castle, Berkeley Castle and Monmouth Castle. FitzOsbern also created or improved fortifications in the towns of Hereford and Shrewsbury.

Distraction and death in Flanders[edit]

In 1070 trouble arose in Flanders, where King William's brother-in-law Baldwin VI of Flanders had died, leaving his county and his young sons in the hands of his widow Richilde, Countess of Mons and Hainaut. Her control of Flanders was challenged by the brother of her late husband, Robert the Frisian. Looking for help, she offered herself in marriage to fitzOsbern. He could not resist the chance to become also Count of this rich Principality, close to Normandy. He hurried there with his army, but nevertheless was defeated by the Count of Flanders, losing his life in the Battle of Cassel on 22 February 1071.

Personal life[edit]

FitzOsbern married first Adeliza de Tosny, daughter of Roger I of Tosny. One assumes that he also married Richilde shortly before the Battle of Cassel.

FitzOsbern and Adeliza had three children:

William FitzOsbern lived in Carisbrooke Castle.


  1. ^ Orderic Vital, Histoire de Normandie, tome 2, Ed. Charles Corlet, Caen 1826-Paris 2009, p. 10
  2. ^ Orderic Vital, Histoire de Normandie, tome 2, Ed. Charles Corlet, Caen 1826-Paris 2009, p. 27
  3. ^ Francis Palgrave, The History of Normandy and of England... !V:398ff.
  • David C. Douglas, "The Ancestors of William Fitz Osborn", English Historical Review, 59 (1944), 62–79
  • Chris P. Lewis, "The early earls of Norman England", Anglo-Norman Studies, 13 (1991), 207–23
  • Lynn Nelson, The Normans in South Wales, 1070–1171 (see especially pages 24–33 in chapter 2)
  • W.E. Wightman, "The palatine earldom of William fitz Osbern in Gloucestershire and Worcestershire (1066–1071)", English Historical Review, 77 (1962), 6–17
  • P.M. Remfry, The Herefordshire Beacon and the Families of King Harold II and the Earls of Hereford and Worcester (ISBN 1-899376-73-9)

External links[edit]

Preceded by
New Creation
Earl of Hereford Succeeded by
Roger de Breteuil