Mary of Waltham, Duchess of Brittany
E66890
Mary of Waltham, Duchess of Brittany, was a 14th-century English princess, daughter of King Edward III, who became duchess through her marriage to John IV, Duke of Brittany.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Mary of Waltham, Duchess of Brittany canonical | 4 |
| Mary of Waltham | 3 |
| Duchess of Brittany | 1 |
| Duchess of Brittany (consort) | 1 |
| Isabella, Duchess of Brittany | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T520530 — 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: Mary of Waltham, Duchess of Brittany Context triple: [Edward III of England, child, Mary of Waltham, Duchess of Brittany]
-
A.
Beatrice of England
Beatrice of England was a 13th-century English princess and daughter of King Henry III who became Duchess of Brittany through her marriage to John II, Duke of Brittany.
-
B.
Queen Philippa of Hainault
Queen Philippa of Hainault was a 14th-century Queen of England, wife of King Edward III, noted for her political influence, patronage of learning, and reputation for kindness and mercy.
-
C.
Eleanor of England, Countess of Pembroke
Eleanor of England, Countess of Pembroke, was a 13th-century English princess and noblewoman who, through her influential marriage to William Marshal the Younger, became a prominent figure in the politics and aristocracy of the Angevin realm.
-
D.
Mary of Scotland, Countess of Boulogne
Mary of Scotland, Countess of Boulogne, was a 12th-century Scottish princess and noblewoman who became Countess of Boulogne through marriage and was the daughter of King Malcolm III and Saint Margaret of Scotland.
-
E.
Eleanor of England, Countess of Bar
Eleanor of England, Countess of Bar, was a 13th-century English princess, daughter of King Edward I, who became Countess of Bar through her marriage to Henry III, Count of Bar.
- 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: Mary of Waltham, Duchess of Brittany Target entity description: Mary of Waltham, Duchess of Brittany, was a 14th-century English princess, daughter of King Edward III, who became duchess through her marriage to John IV, Duke of Brittany.
-
A.
Beatrice of England
Beatrice of England was a 13th-century English princess and daughter of King Henry III who became Duchess of Brittany through her marriage to John II, Duke of Brittany.
-
B.
Queen Philippa of Hainault
Queen Philippa of Hainault was a 14th-century Queen of England, wife of King Edward III, noted for her political influence, patronage of learning, and reputation for kindness and mercy.
-
C.
Eleanor of England, Countess of Pembroke
Eleanor of England, Countess of Pembroke, was a 13th-century English princess and noblewoman who, through her influential marriage to William Marshal the Younger, became a prominent figure in the politics and aristocracy of the Angevin realm.
-
D.
Mary of Scotland, Countess of Boulogne
Mary of Scotland, Countess of Boulogne, was a 12th-century Scottish princess and noblewoman who became Countess of Boulogne through marriage and was the daughter of King Malcolm III and Saint Margaret of Scotland.
-
E.
Eleanor of England, Countess of Bar
Eleanor of England, Countess of Bar, was a 13th-century English princess, daughter of King Edward I, who became Countess of Bar through her marriage to Henry III, Count of Bar.
- F. None of above. chosen
Statements (38)
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: Mary of Waltham, Duchess of Brittany Description of subject: Mary of Waltham, Duchess of Brittany, was a 14th-century English princess, daughter of King Edward III, who became duchess through her marriage to John IV, Duke of Brittany.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Isabella, Duchess of Brittany
this entity surface form:
Duchess of Brittany (consort)
this entity surface form:
Duchess of Brittany
subject surface form:
Philippa of Hainault
this entity surface form:
Mary of Waltham
this entity surface form:
Mary of Waltham
this entity surface form:
Mary of Waltham