Joan Holland, Duchess of Brittany
E1038637
Joan Holland, Duchess of Brittany, was an English noblewoman of the prominent Holland family who became Duchess consort through her marriage to John IV, Duke of Brittany, in the late 14th century.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Joan Holland, Duchess of Brittany canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11971232 — 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: Joan Holland, Duchess of Brittany Context triple: [John IV, Duke of Brittany, spouse, Joan Holland, Duchess of Brittany]
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A.
Hawise, Duchess of Brittany
Hawise, Duchess of Brittany was an 11th-century Breton noblewoman who ruled the Duchy of Brittany in her own right and played a key role in the region’s dynastic politics.
-
B.
Mary of Waltham, Duchess of Brittany
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.
-
C.
Joan of Valois, Duchess of Brittany
Joan of Valois, Duchess of Brittany, was a 14th-century French princess of the Valois dynasty who became Duchess of Brittany through marriage into the Breton ducal house.
-
D.
Blanche of Brittany
Blanche of Brittany was a 13th-century French noblewoman of the ducal house of Brittany, notable for her Plantagenet royal connections through her mother Beatrice of England.
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E.
Constance, Duchess of Brittany
Constance, Duchess of Brittany, was a 12th-century Breton noblewoman and heiress whose turbulent marriages and political struggles significantly shaped the succession disputes between England and Brittany.
- 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: Joan Holland, Duchess of Brittany Target entity description: Joan Holland, Duchess of Brittany, was an English noblewoman of the prominent Holland family who became Duchess consort through her marriage to John IV, Duke of Brittany, in the late 14th century.
-
A.
Hawise, Duchess of Brittany
Hawise, Duchess of Brittany was an 11th-century Breton noblewoman who ruled the Duchy of Brittany in her own right and played a key role in the region’s dynastic politics.
-
B.
Mary of Waltham, Duchess of Brittany
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.
-
C.
Joan of Valois, Duchess of Brittany
Joan of Valois, Duchess of Brittany, was a 14th-century French princess of the Valois dynasty who became Duchess of Brittany through marriage into the Breton ducal house.
-
D.
Blanche of Brittany
Blanche of Brittany was a 13th-century French noblewoman of the ducal house of Brittany, notable for her Plantagenet royal connections through her mother Beatrice of England.
-
E.
Constance, Duchess of Brittany
Constance, Duchess of Brittany, was a 12th-century Breton noblewoman and heiress whose turbulent marriages and political struggles significantly shaped the succession disputes between England and Brittany.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
English noble
ⓘ
duchess consort ⓘ noblewoman ⓘ |
| aristocraticHouse | House of Holland ⓘ |
| associatedDynasty | Duchy of Brittany ⓘ |
| century | 14th century ⓘ |
| countryOfOrigin | Kingdom of England ⓘ |
| floruit | late 14th century ⓘ |
| gender | female ⓘ |
| historicalPeriod | Late Middle Ages ⓘ |
| languageOfEnvironment | Middle English ⓘ |
| maritalStatus | married ⓘ |
| marriageType | dynastic marriage ⓘ |
| name | Joan Holland ⓘ |
| nobleFamily | Holland family ⓘ |
| nobleRank | duchess ⓘ |
| nobleTitleFromMarriage | Duchess of Brittany ⓘ |
| positionHeld | Duchess consort of Brittany ⓘ |
| regionOfActivity |
Brittany
ⓘ
England ⓘ |
| socialClass | high nobility ⓘ |
| spouse | John IV, Duke of Brittany ⓘ |
| spouseName |
John IV of Brittany
ⓘ
linked to:
John IV, Duke of Brittany
|
| spouseTitle | Duke of Brittany ⓘ |
| title | Duchess of Brittany ⓘ |
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: Joan Holland, Duchess of Brittany Description of subject: Joan Holland, Duchess of Brittany, was an English noblewoman of the prominent Holland family who became Duchess consort through her marriage to John IV, Duke of Brittany, in the late 14th century.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.