Robert, Count of Mortain
E468779
Robert, Count of Mortain was a powerful Norman nobleman, half-brother of William the Conqueror, who played a key role in the Norman Conquest of England and became one of the largest landholders in the country.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Robert, Count of Mortain canonical | 3 |
| Robert of Mortain | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4727293 — 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: Robert, Count of Mortain Context triple: [Herleva of Falaise, child, Robert, Count of Mortain]
-
A.
Arnulf de Montgomery
Arnulf de Montgomery was an Anglo-Norman nobleman and marcher lord of the late 11th and early 12th centuries, known for his role in the Norman consolidation of power in Wales and the Welsh borderlands.
-
B.
Ranulf de Blondeville
Ranulf de Blondeville was a powerful Anglo-Norman nobleman and military leader of the late 12th and early 13th centuries, best known as the 6th Earl of Chester and a key supporter of the English crown during the reigns of Richard I and John.
-
C.
William d'Aubigny
William d'Aubigny was a 13th-century English nobleman and rebel baron who played a prominent role in the conflicts against King John, including the events surrounding the siege of Rochester Castle.
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D.
Ranulf le Meschin
Ranulf le Meschin was an Anglo-Norman nobleman and military leader of the early 12th century who became Earl of Chester and played a key role in consolidating Norman control in northern England.
-
E.
Gordon de Blois
Gordon de Blois was the husband of pioneering American modernist architect Natalie de Blois.
- 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: Robert, Count of Mortain Target entity description: Robert, Count of Mortain was a powerful Norman nobleman, half-brother of William the Conqueror, who played a key role in the Norman Conquest of England and became one of the largest landholders in the country.
-
A.
Arnulf de Montgomery
Arnulf de Montgomery was an Anglo-Norman nobleman and marcher lord of the late 11th and early 12th centuries, known for his role in the Norman consolidation of power in Wales and the Welsh borderlands.
-
B.
Ranulf de Blondeville
Ranulf de Blondeville was a powerful Anglo-Norman nobleman and military leader of the late 12th and early 13th centuries, best known as the 6th Earl of Chester and a key supporter of the English crown during the reigns of Richard I and John.
-
C.
William d'Aubigny
William d'Aubigny was a 13th-century English nobleman and rebel baron who played a prominent role in the conflicts against King John, including the events surrounding the siege of Rochester Castle.
-
D.
Ranulf le Meschin
Ranulf le Meschin was an Anglo-Norman nobleman and military leader of the early 12th century who became Earl of Chester and played a key role in consolidating Norman control in northern England.
-
E.
Gordon de Blois
Gordon de Blois was the husband of pioneering American modernist architect Natalie de Blois.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Norman nobleman
ⓘ
count ⓘ feudal magnate ⓘ nobleman ⓘ |
| allegiance |
Duchy of Normandy
NERFINISHED
ⓘ
Kingdom of England NERFINISHED ⓘ |
| associatedWithEvent | reorganization of landholding in post-Conquest England ⓘ |
| birthDate | c. 1031 ⓘ |
| birthPlace | Normandy NERFINISHED ⓘ |
| burialPlace | Abbey of Grestain (probable) NERFINISHED ⓘ |
| child | William, Count of Mortain NERFINISHED ⓘ |
| countryOfOrigin | Duchy of Normandy NERFINISHED ⓘ |
| deathDate | c. 1090 ⓘ |
| deathPlace | Normandy NERFINISHED ⓘ |
| era | 11th century ⓘ |
| father | Herluin de Conteville NERFINISHED ⓘ |
| givenName | Robert ⓘ |
| governed |
large estates in Cornwall
ⓘ
the honor of Mortain in Normandy NERFINISHED ⓘ |
| halfBrother | William the Conqueror NERFINISHED ⓘ |
| heldTitle |
Count of Mortain in Normandy
NERFINISHED
ⓘ
Earl of Cornwall in England NERFINISHED ⓘ |
| landholdingsDocumentedIn | Domesday Book NERFINISHED ⓘ |
| landholdingsRegion |
Cornwall
NERFINISHED
ⓘ
Devon NERFINISHED ⓘ Somerset NERFINISHED ⓘ Sussex NERFINISHED ⓘ other counties in southern and western England ⓘ |
| language | Old Norman NERFINISHED ⓘ |
| lordOf |
Mortain
NERFINISHED
ⓘ
large parts of Cornwall ⓘ |
| mother | Herleva of Falaise NERFINISHED ⓘ |
| name | Robert, Count of Mortain NERFINISHED ⓘ |
| nobleFamily | House of Normandy NERFINISHED ⓘ |
| notableFor |
being one of the largest landholders in England after 1066
ⓘ
role in the Norman Conquest of England ⓘ |
| participatedIn |
Battle of Hastings
NERFINISHED
ⓘ
Norman invasion of England NERFINISHED ⓘ |
| rankAmongLayTenantsInChief | second largest landholder after the king in Domesday Book ⓘ |
| relative |
Odo of Bayeux
NERFINISHED
ⓘ
William the Conqueror NERFINISHED ⓘ |
| religion | Roman Catholicism ⓘ |
| roleInConquest | provided ships and troops for the Norman invasion ⓘ |
| sibling | Odo of Bayeux NERFINISHED ⓘ |
| spouse | Matilda de Montgomery NERFINISHED ⓘ |
| supported | William the Conqueror NERFINISHED ⓘ |
| title |
Count of Mortain
NERFINISHED
ⓘ
Earl of Cornwall 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: Robert, Count of Mortain Description of subject: Robert, Count of Mortain was a powerful Norman nobleman, half-brother of William the Conqueror, who played a key role in the Norman Conquest of England and became one of the largest landholders in the country.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Robert of Mortain
this entity surface form:
Robert of Mortain