Geoffrey II, Duke of Brittany
E124436
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Geoffrey II, Duke of Brittany canonical | 11 |
| Geoffrey of Brittany | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T952119 — 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: Geoffrey II, Duke of Brittany Context triple: [Richard I of England, sibling, Geoffrey II, Duke of Brittany]
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A.
Duke of Brittany
The Duke of Brittany was the sovereign or semi-sovereign ruler of the historic region of Brittany in northwestern France, holding a ducal title central to the area's medieval political and cultural identity.
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B.
Hugh of Vermandois
Hugh of Vermandois was a French nobleman and younger brother of King Philip I of France who served as one of the prominent princely leaders during the First Crusade.
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C.
Gaston de Blondeville
Gaston de Blondeville is a historical Gothic romance novel by Ann Radcliffe, set in medieval England and blending chivalric adventure with supernatural elements.
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D.
Duke of Aquitaine
The Duke of Aquitaine was a powerful medieval noble title associated with rulership over the rich and strategically important region of Aquitaine in southwestern France, often held by English kings during the High Middle Ages.
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E.
Robert I, Duke of Normandy
Robert I, Duke of Normandy was an early 11th-century Norman ruler best known as the father of William the Conqueror and for his pious pilgrimage to the Holy Land, during which he died.
- 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: Geoffrey II, Duke of Brittany Target entity description: 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.
-
A.
Duke of Brittany
The Duke of Brittany was the sovereign or semi-sovereign ruler of the historic region of Brittany in northwestern France, holding a ducal title central to the area's medieval political and cultural identity.
-
B.
Hugh of Vermandois
Hugh of Vermandois was a French nobleman and younger brother of King Philip I of France who served as one of the prominent princely leaders during the First Crusade.
-
C.
Gaston de Blondeville
Gaston de Blondeville is a historical Gothic romance novel by Ann Radcliffe, set in medieval England and blending chivalric adventure with supernatural elements.
-
D.
Duke of Aquitaine
The Duke of Aquitaine was a powerful medieval noble title associated with rulership over the rich and strategically important region of Aquitaine in southwestern France, often held by English kings during the High Middle Ages.
-
E.
Robert I, Duke of Normandy
Robert I, Duke of Normandy was an early 11th-century Norman ruler best known as the father of William the Conqueror and for his pious pilgrimage to the Holy Land, during which he died.
- F. None of above. chosen
Statements (46)
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: Geoffrey II, Duke of Brittany Description of subject: 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.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Richard I of England
this entity surface form:
Geoffrey of Brittany
this entity surface form:
Geoffrey of Brittany