Eustace III, Count of Boulogne

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Eustace III, Count of Boulogne
Godefroy de Bouillon.jpg
Eustace (shown with white hair) with his brothers Godfrey and Baldwin meeting with Byzantine emperor Alexius I Comnenus
Spouse(s) Mary of Scotland
Noble family House of Flanders
Father Eustace II of Boulogne
Mother Ida of Lorraine
Born before c.  1058
Died c.  1125

Eustace III, was a count of Boulogne, successor to his father Count Eustace II of Boulogne. His mother was Ida of Lorraine.

His father Eustace II appeared at the Battle of Hastings in 1066 as an ally of William the Conqueror, and is listed as a possible killer of Harold II; he is also believed to have given William his own horse after the duke's was killed under him by Gyrth, brother of Harold.

Eustace III succeeded as Count of Boulogne in 1087.[1]

In 1088, Eustace supported the rebellion against William II of England in favour of Robert Curthose.[2]

He went on the First Crusade in 1096 with his brothers Godfrey of Bouillon (duke of Lower Lotharingia) and Baldwin of Boulogne. He soon returned to Europe to administer his domains. He married Mary of Scotland, daughter of King Malcolm III of Scotland, and Saint Margaret of Scotland. Eustace and Mary had one daughter, Matilda of Boulogne.

When his youngest brother king Baldwin I of Jerusalem died in 1118, the elderly Eustace was offered the throne. Eustace was at first uninterested, but was convinced to accept it; he travelled all the way to Apulia before learning that a distant relative, Baldwin of Bourcq, had been crowned in the meantime. Eustace returned to Boulogne and died about 1125.

On his death the county of Boulogne was inherited by his daughter, Matilda, and her husband Stephen de Blois, count of Mortain, afterwards king of England, and at the death of Matilda in 1152 it was inherited by their son, Eustace IV of Boulogne, later their second son William and ultimately by their daughter Marie of Boulogne, since both sons died without children.



  1. ^ Cawley, Charles, NORTHERN FRANCE, NOBILITY, Foundation for Medieval Genealogy, retrieved August 2012 ,[better source needed]
  2. ^ Barlow, p. 77.


  • Barlow, Frank (1983). William Rufus. University of California Press. 
  • Payne, Robert. Dream and the Tomb, 1984
  • Howarth, David Armine. 1066: The Year of the Conquest, 1977
  • "Foundation of Medieval Genealogy". 
Eustace III, Count of Boulogne
House of Boulogne
Born: before 1060 Died: c. 1125
Preceded by
Eustace II
Count of Boulogne Blason Courtenay.svg
Succeeded by
Matilda I