William I, Count of Boulogne
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William I (11 October 1159) (french: Guillaume de Boulogne) was
Count of Boulogne Count of Boulogne was a historical title in the Kingdom of France. The city of Boulogne-sur-Mer became the centre of the county of Boulogne during the ninth century. Little is known of the early counts, but the first holder of the title is recor ...
and
Earl of Surrey Earl of Surrey is a title in the Peerage of England that has been created five times. It was first created for William de Warenne, 1st Earl of Surrey, William de Warenne, a close Companions of William the Conqueror, companion of William the Con ...
''
jure uxoris ''Jure uxoris'' (a Latin phrase meaning "by right of (his) wife"), citing . describes a title of nobility used by a man because his wife holds the office or title ''suo jure'' ("in her own right"). Similarly, the husband of an heiress could becom ...
'' from 1153 until his death. He was the second son of
Stephen, King of England Stephen (1092 or 1096 – 25 October 1154), often referred to as Stephen of Blois, was King of England from 22 December 1135 to his death in 1154. He was Count of Boulogne ''jure uxoris'' from 1125 until 1147 and Duke of Normandy from 1135 unti ...
, and
Matilda I, Countess of Boulogne Matilda (c.1105 – 3 May 1152) was Countess of Boulogne in her own right from 1125 and Queen of England from the accession of her husband, Stephen, in 1136 until her death in 1152. She supported Stephen in his struggle for the English throne ...
. William married
Isabel de Warenne, 4th Countess of Surrey Isabel is a female name of Spanish origin. Isabelle is a name that is similar, but it is of French origin. It originates as the medieval Spanish form of '' Elisabeth'' (ultimately Hebrew '' Elisheva''), Arising in the 12th century, it became popu ...
, in 1148. In 1153, Stephen agreed to pass over William's elder brother
Eustace IV of Boulogne Eustace IV (c. 1129/1131 17 August 1153) ruled the County of Boulogne from 1146 until his death. He was the eldest son of King Stephen of England and Countess Matilda I of Boulogne. When his father seized the English throne on Henry I's death i ...
as heir to the throne, conceding the succession to Henry Plantagenet, son of his cousin and rival
Empress Matilda Empress Matilda ( 7 February 110210 September 1167), also known as the Empress Maude, was one of the claimants to the English throne during the civil war known as the Anarchy. The daughter of King Henry I of England, she moved to Germany as ...
. Eustace died shortly afterwards and when his father signed the
Treaty of Wallingford The Treaty of Wallingford, also known as the Treaty of Winchester or the Treaty of Westminster, was an agreement reached in England in the summer of 1153. It effectively ended a civil war known as '' the Anarchy'' (1135–54), caused by a dispute ...
, William received the lands intended for both brothers, making him immensely rich. The treaty ended
the Anarchy The Anarchy was a civil war in England and Normandy between 1138 and 1153, which resulted in a widespread breakdown in law and order. The conflict was a war of succession precipitated by the accidental death of William Adelin, the only legiti ...
, a succession struggle between Stephen and Matilda of which both sides were growing weary. Stephen died in 1154, and Henry initially allowed William of Blois to retain the earldom of Surrey ''
jure uxoris ''Jure uxoris'' (a Latin phrase meaning "by right of (his) wife"), citing . describes a title of nobility used by a man because his wife holds the office or title ''suo jure'' ("in her own right"). Similarly, the husband of an heiress could becom ...
'' (in right of his wife). However,
Gervase of Canterbury Gervase of Canterbury (; Latin: Gervasus Cantuariensis or Gervasius Dorobornensis) (c. 1141 – c. 1210) was an English chronicler. Life If Gervase's brother Thomas, who like himself was a monk of Christ Church, Canterbury, was Thomas of Ma ...
asserts a plot against Henry's life was discovered in 1154 among some Flemish mercenaries. The plan was to assassinate Henry in
Canterbury Canterbury (, ) is a City status in the United Kingdom, cathedral city and UNESCO World Heritage Site, situated in the heart of the City of Canterbury local government district of Kent, England. It lies on the River Stour, Kent, River Stour. ...
, and allegedly William of Blois had knowledge of this plot or was in connivance with the mercenaries. Whatever the truth, Henry fled Canterbury and returned to Normandy. William had no children. He died in 1159 of disease near
Toulouse Toulouse ( , ; oc, Tolosa ) is the prefecture of the French department of Haute-Garonne and of the larger region of Occitania. The city is on the banks of the River Garonne, from the Mediterranean Sea, from the Atlantic Ocean and from Par ...
, and was buried at the Poitevin abbey of Montmorel (french: Abbaye de Montmorel). He was succeeded in his county by his sister
Mary I Mary I (18 February 1516 – 17 November 1558), also known as Mary Tudor, and as "Bloody Mary" by her Protestant opponents, was Queen of England and Ireland from July 1553 and Queen of Spain from January 1556 until her death in 1558. She ...
. His widow remarried to Henry's half-brother
Hamelin Hamelin ( ; german: Hameln ) is a town on the river Weser in Lower Saxony, Germany. It is the capital of the district of Hamelin-Pyrmont and has a population of roughly 57,000. Hamelin is best known for the tale of the Pied Piper of Hamelin. H ...
.


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*
R. H. C. Davis Ralph Henry Carless Davis (7 October 1918 – 12 March 1991) was a British historian and educator specialising in the European Middle Ages. Davis was born and died in Oxford. He was a leading exponent of strict documentary analysis and interpre ...
(1967), ''King Stephen'' * Thomas K. Keefe, "William, earl of Surrey (c. 1135–1159)", ''Oxford Dictionary of National Biography'', 2004 * {{DEFAULTSORT:William 01, Count of Boulogne 1130s births 1159 deaths Year of birth uncertain 12th-century English nobility 1041 Counts of Boulogne Counts of Mortain House of Blois Children of Stephen, King of England Anglo-Normans Heirs apparent who never acceded Sons of kings