Earldom of Cornwall
E701460
The Earldom of Cornwall was a powerful medieval English title and territorial lordship centered in Cornwall, often held by members of the royal family and associated with significant political and economic influence.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Earldom of Cornwall canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7873924 — 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: Earldom of Cornwall Context triple: [Henry of Almain, associatedWith, Earldom of Cornwall]
-
A.
Earldom of Sandwich
The Earldom of Sandwich is a hereditary British peerage title in the Montagu family, historically associated with naval service and famously linked to John Montagu, the 4th Earl, after whom the sandwich is named.
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B.
Duchy of Cornwall
The Duchy of Cornwall is a private estate that provides income for the Prince of Wales, consisting of extensive landholdings and properties primarily in southwest England.
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C.
Duchy of Lancaster
The Duchy of Lancaster is a private estate and portfolio of land, property, and assets held in trust for the British monarch in their role as Duke of Lancaster, providing an independent source of income separate from the Crown Estate.
-
D.
Duchy of Albany
The Duchy of Albany was a Scottish peerage title historically granted to junior members of the royal family, often associated with governance of the region around Stirling and the central Highlands.
-
E.
Dukedom of Gloucester
The Dukedom of Gloucester is a British royal title traditionally granted to close male relatives of the monarch, with its holders often playing supporting roles within the Royal Family.
- 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: Earldom of Cornwall Target entity description: The Earldom of Cornwall was a powerful medieval English title and territorial lordship centered in Cornwall, often held by members of the royal family and associated with significant political and economic influence.
-
A.
Earldom of Sandwich
The Earldom of Sandwich is a hereditary British peerage title in the Montagu family, historically associated with naval service and famously linked to John Montagu, the 4th Earl, after whom the sandwich is named.
-
B.
Duchy of Cornwall
The Duchy of Cornwall is a private estate that provides income for the Prince of Wales, consisting of extensive landholdings and properties primarily in southwest England.
-
C.
Duchy of Lancaster
The Duchy of Lancaster is a private estate and portfolio of land, property, and assets held in trust for the British monarch in their role as Duke of Lancaster, providing an independent source of income separate from the Crown Estate.
-
D.
Duchy of Albany
The Duchy of Albany was a Scottish peerage title historically granted to junior members of the royal family, often associated with governance of the region around Stirling and the central Highlands.
-
E.
Dukedom of Gloucester
The Dukedom of Gloucester is a British royal title traditionally granted to close male relatives of the monarch, with its holders often playing supporting roles within the Royal Family.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
earldom
ⓘ
medieval English title ⓘ territorial lordship ⓘ |
| associatedWith |
Cornish tin trade
ⓘ
Duchy of Cornwall ⓘ English royal finances ⓘ House of Anjou ⓘ House of Plantagenet ⓘ baronial politics in medieval England ⓘ |
| borderedBy | Devon ⓘ |
| country | Kingdom of England ⓘ |
| createdBy |
William I of England
ⓘ
linked to:
William the Conqueror
|
| createdFor | Brian of Brittany ⓘ |
| creationDate | 11th century ⓘ |
| economicSignificance |
control of coastal trade and ports
ⓘ
control of extensive landed estates ⓘ control of tin mining revenues ⓘ |
| firstHolder |
Brian of Brittany
ⓘ
Robert, Count of Mortain ⓘ |
| governingSystem | feudal lordship ⓘ |
| hasCapital |
Launceston
ⓘ
Lostwithiel ⓘ Tintagel (ceremonial and legendary association) ⓘ
linked to:
Tintagel, Cornwall, England
|
| hasRight |
feudal rights over tenants in Cornwall
ⓘ
jurisdictional privileges within the earldom ⓘ |
| heldBy | heirs apparent to the English throne (in later medieval period) ⓘ |
| languageOfAdministration |
Anglo‑Norman French
ⓘ
linked to:
Anglo-Norman
Latin ⓘ Middle English ⓘ |
| locatedIn |
Cornwall
ⓘ
South West England ⓘ
linked to:
southwest England
|
| notableHolder |
Edmund, 2nd Earl of Cornwall
ⓘ
Edward, the Black Prince ⓘ
linked to:
Edward the Black Prince
John of Eltham, Earl of Cornwall ⓘ Piers Gaveston, 1st Earl of Cornwall ⓘ
linked to:
Piers Gaveston
Reginald de Dunstanville, 1st Earl of Cornwall ⓘ Richard, 1st Earl of Cornwall ⓘ Robert, Count of Mortain ⓘ members of the English royal family ⓘ |
| partOf | English peerage ⓘ |
| politicalSignificance | major regional power base in south‑western England ⓘ |
| precededBy | Cornish royal lordship ⓘ |
| region | Cornish peninsula ⓘ |
| status | extinct as an earldom and transformed into a duchy ⓘ |
| succeededBy | Duchy of Cornwall ⓘ |
| successorTitle | Duke of Cornwall ⓘ |
| timePeriod |
High Middle Ages
ⓘ
Late Middle Ages ⓘ |
| transformedInto | Duchy of Cornwall ⓘ |
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: Earldom of Cornwall Description of subject: The Earldom of Cornwall was a powerful medieval English title and territorial lordship centered in Cornwall, often held by members of the royal family and associated with significant political and economic influence.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.