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County of Nantes

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The counts of Nantes were originally the Frankish rulers of the Nantais under the Carolingians and eventually a capital city of the Duchy of Brittany. Their county served as a march against the Bretons of the Vannetais. Carolingian rulers would sometimes attack Brittany through the region of the Vannetais, making Nantes a strategic asset. In the mid-ninth century, the county finally fell to the Bretons and the title became a subsidiary title of the Breton rulers. The control of the title by the Breton dukes figured prominently in the history of the duchy. The County of Nantes was given to Hoel, a disinherited son of a duke. He lost the countship due to a popular uprising. That uprising presented an opportunity for King Henry II of England to attack the Breton duke. In the treaty ending their conflicts, the Breton duke awarded the county to Henry II.

Frankish counts

Kingdom of Brittany

Alan I, King of Brittany ruled Nantes as King of Brittany until his death in 907.

Norse occupation from 914 to 938

  • 907 - c 914 - vacant

Rognvaldr also known as Ragenold

  • 914 - 919 - Rognvaldr as a leader of the Loire Raiding Fleet lands in Nantes; King Gourmaelon killed in battle, King Robert of Neustria continues conflict with invading Norse.
  • 919 - Robert cedes Nantes to Rognvaldr who renames it Namsborg, makes peace and agrees to convert to Christianity for being allowed to keep Brittany.
  • 924 - Rognvaldr ravages the lands between the Seine and the Loire and then Burgundy but is finally defeated at Chalmont.
  • 927 - The Franks launch another failed attempt to retake Nantes.
  • 930 - Rognvaldr reigns until his death.

Hakom Rognvaldrsson also known as Incon

  • 930 - Hakon Rognvaldrsson, known to the Franks as Incon, Norse leader after the death of Rognvaldr, King Rudolph of the Franks defeats Incon at Estress that same year.
  • 931 - Breton peasant revolt broken and their leader Felecan killed.
  • 935 - Incon isolated after William 1 Longsword of Normandy reconciles with the Franks and exiled Bretons start returning from Britain.
  • 936 - 938 - Alan Barbetorte returns to Brittany from England and engages the Norse, Incon slain at recapture of Nantes in 937.

Later counts

The County of Nantes was merged permanently into the Ducal crown of Brittany, and subsequently the crown of France, through Constance's descendants.


  1. ^ "Geoffrey (...) seems to have finally acquired the county of Nantes from Henry II in 1185", see Judith Everard and Michael Jones, The Charters of Duchess Constance of Brittany and Her Family (1171-1221), p 1


  1. ^ Judith Everard et Michael Jones, The Charters of Duchess Constance of Brittany and Her Family (1171-1221), p 38
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County of Nantes
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