Dukes of Brittany from the House of Montfort
E921432
The Dukes of Brittany from the House of Montfort were a late medieval ruling dynasty of the Duchy of Brittany whose claim to power sparked prolonged succession disputes and civil conflict with rival noble houses.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Dukes of Brittany from the House of Montfort canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11362188 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Dukes of Brittany from the House of Montfort Context triple: [House of Penthièvre, conflictWith, Dukes of Brittany from the House of Montfort]
-
A.
Montfort-l’Amaury line
The Montfort-l’Amaury line was a prominent medieval French noble branch of the House of Montfort, associated with the lordship of Montfort-l’Amaury in Île-de-France.
-
B.
Ducal house of Aquitaine
The Ducal house of Aquitaine was a powerful medieval ruling dynasty that controlled the Duchy of Aquitaine in southwestern France and played a major role in European politics, especially through its ties to the Plantagenet kings of England.
-
C.
Lusignan dynasty
The Lusignan dynasty was a French-origin noble house that rose to prominence as the ruling family of the Crusader Kingdom of Cyprus and later the Kingdom of Jerusalem, playing a major role in the politics of the eastern Mediterranean during the Middle Ages.
-
D.
Dukes of Richmond
The Dukes of Richmond are a prominent English noble title historically associated with the royal FitzRoy family and closely linked to the British aristocracy and court.
-
E.
Capetian cadet branch
The Capetian cadet branch refers to a junior line of the French royal Capetian dynasty, descended from younger sons who founded separate noble houses distinct from the main royal line.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Dukes of Brittany from the House of Montfort Target entity description: The Dukes of Brittany from the House of Montfort were a late medieval ruling dynasty of the Duchy of Brittany whose claim to power sparked prolonged succession disputes and civil conflict with rival noble houses.
-
A.
Montfort-l’Amaury line
The Montfort-l’Amaury line was a prominent medieval French noble branch of the House of Montfort, associated with the lordship of Montfort-l’Amaury in Île-de-France.
-
B.
Ducal house of Aquitaine
The Ducal house of Aquitaine was a powerful medieval ruling dynasty that controlled the Duchy of Aquitaine in southwestern France and played a major role in European politics, especially through its ties to the Plantagenet kings of England.
-
C.
Lusignan dynasty
The Lusignan dynasty was a French-origin noble house that rose to prominence as the ruling family of the Crusader Kingdom of Cyprus and later the Kingdom of Jerusalem, playing a major role in the politics of the eastern Mediterranean during the Middle Ages.
-
D.
Dukes of Richmond
The Dukes of Richmond are a prominent English noble title historically associated with the royal FitzRoy family and closely linked to the British aristocracy and court.
-
E.
Capetian cadet branch
The Capetian cadet branch refers to a junior line of the French royal Capetian dynasty, descended from younger sons who founded separate noble houses distinct from the main royal line.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
ducal dynasty
ⓘ
noble family branch ⓘ ruling house ⓘ |
| capital | Nantes NERFINISHED ⓘ |
| coatOfArms | ermine field (Brittany) quartered with Montfort arms ⓘ |
| conflict |
Hundred Years’ War (as part of wider context)
NERFINISHED
ⓘ
War of the Breton Succession NERFINISHED ⓘ |
| country | Duchy of Brittany NERFINISHED ⓘ |
| endTime | 1514 ⓘ |
| era |
Early Renaissance
NERFINISHED
ⓘ
Late Middle Ages ⓘ |
| foundedBy | John of Montfort NERFINISHED ⓘ |
| hasMember |
Anne of Brittany
NERFINISHED
ⓘ
Arthur III, Duke of Brittany NERFINISHED ⓘ Claude of France NERFINISHED ⓘ Francis I, Duke of Brittany NERFINISHED ⓘ Francis II, Duke of Brittany NERFINISHED ⓘ John IV, Duke of Brittany NERFINISHED ⓘ John V, Duke of Brittany NERFINISHED ⓘ John of Montfort NERFINISHED ⓘ Peter II, Duke of Brittany NERFINISHED ⓘ |
| hasTitle |
Count of Montfort-l’Amaury
NERFINISHED
ⓘ
Duke of Brittany NERFINISHED ⓘ |
| inConflictWith |
Charles of Blois
NERFINISHED
ⓘ
House of Blois NERFINISHED ⓘ supporters of the House of Blois ⓘ |
| language |
Breton
ⓘ
French ⓘ |
| lastRulingMember | Claude of France NERFINISHED ⓘ |
| nobleFamily | House of Montfort NERFINISHED ⓘ |
| notableEvent |
Treaty of Guérande (1365)
NERFINISHED
ⓘ
Treaty of Guérande (1381) NERFINISHED ⓘ Union of Brittany and France NERFINISHED ⓘ |
| opposedBy | King Philip VI of France NERFINISHED ⓘ |
| originatesFrom | Montfort-l’Amaury NERFINISHED ⓘ |
| partOf |
Breton nobility
ⓘ
French nobility ⓘ |
| politicalStatus |
largely autonomous rulers of Brittany
ⓘ
vassal of the King of France ⓘ |
| religion | Roman Catholicism ⓘ |
| residence |
Château des ducs de Bretagne
NERFINISHED
ⓘ
Ducal residences in Vannes ⓘ |
| startTime | 1341 ⓘ |
| supportedBy | King Edward III of England NERFINISHED ⓘ |
| territory |
Brittany
NERFINISHED
ⓘ
parts of western France ⓘ |
| unionConcludedBy | marriages of Anne of Brittany to Charles VIII and Louis XII of France ⓘ |
| unionWith | Kingdom of France NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Dukes of Brittany from the House of Montfort Description of subject: The Dukes of Brittany from the House of Montfort were a late medieval ruling dynasty of the Duchy of Brittany whose claim to power sparked prolonged succession disputes and civil conflict with rival noble houses.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.