Conan II, Duke of Brittany
E935187
Conan II, Duke of Brittany was an 11th-century Breton ruler known for his efforts to assert the duchy's independence from Norman and French influence.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Conan II, Duke of Brittany canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T11362069 — 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: Conan II, Duke of Brittany Context triple: [House of Rennes, hasMember, Conan II, Duke of Brittany]
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A.
Conan IV, Duke of Brittany
Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
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B.
Geoffrey II, Duke of Brittany
Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
-
C.
Geoffrey I, Duke of Brittany
Geoffrey I, Duke of Brittany was a late 10th- and early 11th-century Breton ruler known for consolidating ducal authority in Brittany and navigating complex alliances with the French crown and neighboring powers.
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D.
Alan IV, Duke of Brittany
Alan IV, Duke of Brittany was an 11th–12th century Breton ruler known for his participation in the First Crusade and his role in consolidating ducal authority in Brittany.
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E.
John III, Duke of Brittany
John III, Duke of Brittany was a 14th-century Breton ruler whose childless reign and succession disputes helped trigger the Breton War of Succession.
- 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: Conan II, Duke of Brittany Target entity description: Conan II, Duke of Brittany was an 11th-century Breton ruler known for his efforts to assert the duchy's independence from Norman and French influence.
-
A.
Conan IV, Duke of Brittany
Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
-
B.
Geoffrey II, Duke of Brittany
Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
-
C.
Geoffrey I, Duke of Brittany
Geoffrey I, Duke of Brittany was a late 10th- and early 11th-century Breton ruler known for consolidating ducal authority in Brittany and navigating complex alliances with the French crown and neighboring powers.
-
D.
Alan IV, Duke of Brittany
Alan IV, Duke of Brittany was an 11th–12th century Breton ruler known for his participation in the First Crusade and his role in consolidating ducal authority in Brittany.
-
E.
John III, Duke of Brittany
John III, Duke of Brittany was a 14th-century Breton ruler whose childless reign and succession disputes helped trigger the Breton War of Succession.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
duke
ⓘ
human ⓘ medieval ruler ⓘ noble ⓘ |
| allegiance | Duchy of Brittany NERFINISHED ⓘ |
| birthDate | circa 1033 ⓘ |
| birthPlace | Brittany NERFINISHED ⓘ |
| burialPlace | Brittany NERFINISHED ⓘ |
| causeOfDeath | possible poisoning ⓘ |
| conflict |
Anglo-Norman expansion in western France
ⓘ
power struggle with Odo, Count of Penthièvre ⓘ rivalry with William II, Duke of Normandy ⓘ |
| country | Duchy of Brittany NERFINISHED ⓘ |
| deathDate | 11 December 1066 ⓘ |
| deathPlace |
Anjou
NERFINISHED
ⓘ
near Angers ⓘ |
| era | 11th century ⓘ |
| ethnicGroup | Breton ⓘ |
| father | Alan III, Duke of Brittany NERFINISHED ⓘ |
| givenName | Conan NERFINISHED ⓘ |
| language |
Breton
ⓘ
Latin ⓘ |
| mannerOfDeath | suspicious death ⓘ |
| mother | Bertha of Blois NERFINISHED ⓘ |
| nobleFamily | House of Rennes NERFINISHED ⓘ |
| notableFor |
efforts to assert Breton ducal independence
ⓘ
resistance to French royal influence in Brittany ⓘ resistance to Norman influence in Brittany ⓘ |
| opponent |
Odo, Count of Penthièvre
NERFINISHED
ⓘ
William the Conqueror NERFINISHED ⓘ |
| politicalGoal |
assert independence of Brittany from Normandy
ⓘ
assert independence of Brittany from the French crown ⓘ |
| positionHeld | Duke of Brittany NERFINISHED ⓘ |
| predecessor | Alan III, Duke of Brittany NERFINISHED ⓘ |
| regencyHeldBy | Odo, Count of Penthièvre NERFINISHED ⓘ |
| regionRuled | Brittany NERFINISHED ⓘ |
| regnalName | Conan II NERFINISHED ⓘ |
| reignEnd | 1066 ⓘ |
| reignStart | 1040 ⓘ |
| religion |
Roman Catholicism
ⓘ
surface form:
Catholicism
|
| sibling | Hawise, Duchess of Brittany NERFINISHED ⓘ |
| successor |
Hawise, Duchess of Brittany
NERFINISHED
ⓘ
Hoël II, Count of Cornouaille NERFINISHED ⓘ |
| title | Duke of Brittany NERFINISHED ⓘ |
| wasMinorAtSuccession | true ⓘ |
| wasRegentFor | Duchy of Brittany 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: Conan II, Duke of Brittany Description of subject: Conan II, Duke of Brittany was an 11th-century Breton ruler known for his efforts to assert the duchy's independence from Norman and French influence.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.