William Clito

William Clito

Infobox British Royalty
name = William Clito
succession = Count of Flanders
reign = 2 March 112728 June 1128
predecessor = Charles I the Good
successor = Thierry of Alsace
spouse = Sibylla of Anjou (1123–1124)
spouse-type = Consort
royal house = House of Normandy
father = Robert II Curthose, Duke of Normandy
mother = Sybilla of Conversano
date of birth = birth date|1102|10|25|df=yes
place of birth = Rouen, Caux
date of death = death date and age|1128|7|28|1102|10|25|df=yes
place of death = Abbey of St. Bertin, St. Omer, Flanders
place of burial = Abbey of St. Bertin|

William Clito (25 October 1102 – 28 July 1128) was the son of Robert Curthose, Duke of Normandy, by his marriage with Sibylla of Conversano. He had a claim on both Normandy and England, and became count of Flanders.

His surname "Clito" was a Latin term equivalent to the Anglo-Saxon "Aetheling", and the Germanic "Adelinus" (used to refer to his first cousin William Adelin, the son of Henry I). Both "Clito" and "Atheling" signified "man of royal blood", or the modern equivalent "prince".

History and family


After his father's defeat and capture by Henry I of England at the Battle of Tinchebrai (1106) the young William fell into the king's hands. Henry placed his nephew in the custody of Helias of Saint Saens, count of Arques, who had married a natural daughter of Duke Robert, his friend and patron. The decision seems to have been intended to conciliate any suspicion of the king’s intentions to his nephew. The boy William stayed in his sister’s and Helias's care until August 1110, when the king abruptly sent agents to demand the boy be handed over to him. Helias was at the time away from home, so his household concealed the boy and smuggled him to their master, who fled the duchy and lost his lands as a result.

First Norman Rebellion, 1118-19

William’s first refuge was with King Henry’s great enemy, Robert de Bellême, who had extensive estates south of the duchy. On Robert’s capture in 1112, William and Helias fled to the court of the young Count Baldwin VII of Flanders, William’s cousin. In 1118 a powerful coalition of Norman counts and barons were sufficiently disenchanted with King Henry to ally with Count Baldwin and rebel. They took up William Clito’s cause and commenced a dangerous rebellion.

The Norman border counts and Count Baldwin between them were too powerful for the king and seized much of the north of the duchy. But the promising campaign abruptly ended with Baldwin’s serious injury at the siege of Arques (September 1118). The next year the cause of William Clito was taken up by Louis VI of France. He invaded the duchy down the river Seine, and on 20 August 1119 was met by the troops of King Henry at the Battle of Brémule, where the French were decisively defeated.

William had ridden as a new knight amongst the king’s guard that day, and barely escaped capture. His cousin, King Henry’s son, William Adelin, the next day sent him back the horse he had lost in the battle with other "necessities" in a courtly gesture. The rebellion collapsed, but William continued to find support at the French court. Louis brought his case to the pope’s attention in October 1119 at Reims, and forced Henry I to justify his treatment of the exiled boy.

Second Norman Rebellion, 1123-24

The death by drowning of William Atheling, King Henry’s only legitimate son, on 25 November 1120 transformed William Clito’s fortunes. He was now the obvious male heir to England and Normandy, and a significant party of Norman aristocrats adopted his cause in 1122, led by Amaury de Montfort, count of Evreux and Waleran de Beaumont, count of Meulan.

William’s position was bolstered further by a strategic marriage to Sibylla of Anjou, daughter of Count Fulk V of Anjou. The marriage was supposed to bring William the county of Maine, between Normandy and Anjou, as her dowry. King Henry astutely appealed to canon law, however, and the marriage was eventually annulled in August 1124 on the grounds that the couple were within the prohibited degrees of kinship.

In the meantime, a serious aristocratic rebellion broke out in Normandy in favour of William, but was defeated by Henry’s intelligence network and the lack of organisation of the leaders, who were defeated at the battle of Bourgtheroulde in March 1124. Louis VI was distracted from active intervention as Henry I got his son-in-law, the Emperor Henry V, to threaten Louis from the east.

Count of Flanders

Louis VI made great efforts to further William’s cause in 1127. In January he granted him the royal estates in the French Vexin as a base to attack down the Seine into Normandy, and he was married to the queen’s half sister. The murder of Count Charles the Good of Flanders on 2 March 1127 gave King Louis an even better chance to further William’s fortunes. He marched into Flanders at the head of an army and on 30 March got the barons of the province to accept William as their new count.

Initially, William did well, securing most of the county by the end of May. But English money and the emergence of a rival in Thierry of Alsace led to a deterioration in his position. In February 1128 St Omer and Ghent declared against him, as did Bruges in March. In May 1128 Lille too welcomed Thierry, leaving William controlling little more than the southern fringe of Flanders. However, he struck back at Bruges and at the battle of Axspoele south of the town on 21 June, William defeated Thierry with his Norman knights and French allies.

At this point he was joined by his father-in-law, Duke Godfrey of Brabant, and together their armies besieged Aalst on 12 July, with the probable intention of going on from there to reduce Ghent. But during the course of the siege he was wounded in the arm in a scuffle with a foot soldier. The wound became gangrenous and William died at the age of twenty-five on 28 July 1128, attended to the end by his faithful brother-in-law, Helias of Saint Saens. William’s body was carried to the abbey of St Bertin in St Omer and buried there. He left no children and was survived by his imprisoned father by six years.


*Galbert of Bruges, "The Murder of Charles the Good", trans. J.B. Ross (repr. Toronto, 1982)
*Sandy Burton Hicks, "The Impact of William Clito upon the Continental Policies of Henry I of England," "Viator" 10 (1979), 1-21.
*D. Crouch, "The Normans: History of a Dynasty" (London, 2002)
*C.W. Hollister, "Henry I" (New Haven, 2001)
*J.A. Green "Henry I" (Cambridge, 2006)

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