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Birth:          ABT 1080 
Death:          ABT 1150 

Notes
https://en.wikipedia.org/wiki/Henry_I,_Count_of_Eu
https://en.wikipedia.org/wiki/William,_Count_of_Sully
William, Count of Sully, also known as William the Simple (c.?1085 – c. 1150) was 
Count of Blois and Count of Chartres from 1102 to 1107, and jure uxoris Count of 
Sully. William was the eldest son of Stephen-Henry, Count of Blois and Adela of 
Normandy, daughter of William the Conqueror. He was the older brother of Theobald 
II, Count of Champagne, King Stephen of England and Henry, Bishop of Winchester.

In the absence of male issue to Henry I, William was the eldest legitimate male heir of 
the line of William the Conqueror. He would thus have been the principal rival to 
Henry's daughter Matilda to inherit the throne after Henry's death. However, he was 
not considered as a candidate for the English crown. Several historians have taken 
the view that he was passed over because of mental deficiency; hence his soubriquet 
"William the Simple". Though widely argued, this has never been clearly 
substantiated.

William was at first groomed to inherit the comital throne as Count of Blois and 
Chartres, and was designated count shortly before his father's departure on his 
second crusade in 1102.[1] However he was soon removed from wide ranging comital 
duties by his mother, because of his erratic behaviour. He once assaulted and 
threatened to kill the Bishop of Chartres over a jurisdictional dispute. So, when her 
second son Theobald came of age, around 1107, Adela elevated him to the position of 
count of Blois-Chartres,[2] and forced William to retire to his wife's lands in Sully.

Family and Children[edit]

In 1104, William married Agnes of Sully, the heiress to the lordship of Sully-sur-Loire,
[3] a woman of admirable beauty attached to the court of William's mother. The 
marriage of William and Agnes was a happy one and several children were born.

Their children included:
1.Raoul de Blois de Sully, Abbé de Cluny (Abbaye) 1102-1176
2.Margaret (c. 1105–1145). She married Henry, Count of Eu, Lord of Hastings, about 
1122 1.John, Count of Eu and Lord of Hastings (1130-26 June 1170), married Alice 
d’Aubigny (Calvados), Lady of Smergate, had issue.
2.Béatrice d’Eu
3.Mahaut d'Eu
4.Etienne d'Eu

3.Henry de Sully, Abbot of Fécamp (died 1189)
4.Rudolph de Blois de Sully (1104-1176)
5.Elisabeth de Blois, Abbesse de Caen (1105-1128)
6.Eudes-Archambaud III de Champagne de Sully, Sire of Sully

Parents
OF BLOIS Stephen [chg from Henry] (Etienne Henri) III "Le Sage" (ABT 1045 - 27 May 1102)
OF NORMANDY Adele (Alice) (ABT 1062 - 8 Mar 1137)

Siblings
DE CHAMPAGNE William ("the Simple") (ABT 1080 - ABT 1150)
OF BLOIS Theobald (Thibaud) IV (II) "the Great" (1090 - 8 Jan 1152)
OF BLOIS Stephen (ABT 1095 - 25 Oct 1154)

Marriage To DE SULLY Agnes (ABT 1080 - )
    m.  

Notes

Parents
____ Gilles (Gilon) (ABT 1045 - )
DE BOURGES Eldeberge (ABT 1050 - )

Children by DE SULLY Agnes ABT 1080 - 
DE CHAMPAGNE Margaret (1095 - 15 Dec 1145)

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