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Arnulf I, Count of Flanders

Arnulf I, Count of Flanders

Count of Flanders
The basics
Quick Facts
Intro Count of Flanders
Occupations Politician
Gender male
Birth 001
Mother: ÆlfthrythCountess of Flanders
Father: Baldwin IICount of Flanders
Spouse: Adele of Vermandois
Children: Baldwin IIICount of FlandersLiutgarde of FlandersHildegard of Flanders
The details

Arnulf of Flanders (c. 890 – March 28, 965), called the Great, was the first Count of Flanders, who ruled the County of Flanders, an area that is now northwestern Belgium and southwestern Netherlands.


Arnulf was the son of margrave Baldwin II of Flanders and Ælfthryth of Wessex, daughter of Alfred the Great. Through his mother he was a descendant of the Anglo-Saxon kings of England, and through his father, a descendant of Charlemagne. Presumably Arnulf was named after Saint Arnulf of Metz, a progenitor of the Carolingian dynasty.

At the death of their father in 918, Arnulf became Count of Flanders while his brother Adeloft or Adelolf succeeded to the County of Boulogne. However, in 933 Adeloft died, and Arnulf took the countship of Boulogne for himself, but later conveyed it to his nephew, Arnulf II.

Arnulf I greatly expanded Flemish rule to the south, taking all or part of Artois, Ponthieu, Amiens, and Ostrevent. He exploited the conflicts between Charles the Simple and Robert I of France, and later those between Louis IV and his barons.

In his southern expansion Arnulf inevitably had conflict with the Normans, who were trying to secure their northern frontier. This led to the 942 murder of the Duke of Normandy, William Longsword, at the hands of Arnulf's men. The Viking threat was receding during the later years of Arnulf's life, and he turned his attentions to the reform of the Flemish government.


The name of Arnulf's first wife is unknown but he had at least one daughter by her:

  • Name unknown; married Isaac of Cambrai. Their son Arnulf succeeded his father as Count of Cambrai.

In 934 he married Adele of Vermandois, daughter of Herbert II of Vermandois. Their children were:

  • Hildegarde, born c. 934, died 990; she married Dirk II, Count of Holland. It is uncertain whether she is his daughter by his first or second wife.
  • Liutgard, born in 935, died in 962; married Wichmann IV, Count of Hamaland.
  • Egbert, died 953.
  • Baldwin III of Flanders (c. 940 – 962), married Mathilde of Saxony ( 1008), daughter of Hermann Billung.
  • Elftrude; married Siegfried, Count of Guînes.


Arnulf made his eldest son and heir Baldwin III of Flanders co-ruler in 958, but Baldwin died untimely in 962, so Arnulf was succeeded by Baldwin's infant son, Arnulf II of Flanders.


Additional references

  • Folcwine
  • Lambert of Ardres
  • Platts, Beryl. The Scottish Hazard: Flemish Nobility and their Impact on Scotland, 1985
Preceded by
Baldwin II
Blason Comte-de-Flandre.svg Count of Flanders
with Baldwin III (958–962)
Succeeded by
Arnulf II (Flanders)
Preceded by
Count of Boulogne
Succeeded by
Arnulf II (Boulogne)
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