William FitzOsbern
E649476
William FitzOsbern was an 11th-century Norman nobleman, close companion of William the Conqueror, and a key military leader in the Norman Conquest of England.
All labels observed (1)
| Label | Occurrences |
|---|---|
| William FitzOsbern canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7194961 — 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: William FitzOsbern Context triple: [Monmouth Castle, builtFor, William FitzOsbern]
-
A.
Hugh d'Avranches
Hugh d'Avranches was an 11th-century Norman nobleman and close ally of William the Conqueror who became the powerful Earl of Chester in post-Conquest England.
-
B.
William fitz Duncan
William fitz Duncan was a 12th-century Scottish prince and military leader, notable as a powerful claimant to the Scottish throne and a key figure in the politics of the Kingdom of Alba.
-
C.
Gyrth Godwinson
Gyrth Godwinson was an 11th-century English nobleman and earl, best known as the younger brother and close supporter of King Harold Godwinson who died alongside him resisting the Norman Conquest.
-
D.
Robert of Bellême
Robert of Bellême was a powerful and notoriously ruthless Anglo-Norman nobleman and military leader who held extensive lands in England and Normandy during the late 11th and early 12th centuries.
-
E.
Robert Fitzharding
Robert Fitzharding was a 12th-century Anglo-Norman nobleman and wealthy Bristol merchant who became the first Lord of Berkeley and is best known for establishing the religious house that evolved into Bristol Cathedral.
- 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: William FitzOsbern Target entity description: William FitzOsbern was an 11th-century Norman nobleman, close companion of William the Conqueror, and a key military leader in the Norman Conquest of England.
-
A.
Hugh d'Avranches
Hugh d'Avranches was an 11th-century Norman nobleman and close ally of William the Conqueror who became the powerful Earl of Chester in post-Conquest England.
-
B.
William fitz Duncan
William fitz Duncan was a 12th-century Scottish prince and military leader, notable as a powerful claimant to the Scottish throne and a key figure in the politics of the Kingdom of Alba.
-
C.
Gyrth Godwinson
Gyrth Godwinson was an 11th-century English nobleman and earl, best known as the younger brother and close supporter of King Harold Godwinson who died alongside him resisting the Norman Conquest.
-
D.
Robert of Bellême
Robert of Bellême was a powerful and notoriously ruthless Anglo-Norman nobleman and military leader who held extensive lands in England and Normandy during the late 11th and early 12th centuries.
-
E.
Robert Fitzharding
Robert Fitzharding was a 12th-century Anglo-Norman nobleman and wealthy Bristol merchant who became the first Lord of Berkeley and is best known for establishing the religious house that evolved into Bristol Cathedral.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
11th-century nobleman
ⓘ
Anglo-Norman magnate ⓘ Earl ⓘ Norman nobleman ⓘ |
| allegiance |
Duchy of Normandy
NERFINISHED
ⓘ
Kingdom of England NERFINISHED ⓘ |
| alsoKnownAs |
William Fitz-Osbern
NERFINISHED
ⓘ
William FitzOsberne NERFINISHED ⓘ William fitz Osbern NERFINISHED ⓘ |
| birthCentury | 11th century ⓘ |
| built |
Chepstow Castle
NERFINISHED
ⓘ
Clifford Castle (attributed) NERFINISHED ⓘ Hereford Castle NERFINISHED ⓘ Monmouth Castle (attributed) NERFINISHED ⓘ |
| causeOfDeath | killed in battle ⓘ |
| child |
Emma de Breteuil
NERFINISHED
ⓘ
Roger de Breteuil, 2nd Earl of Hereford NERFINISHED ⓘ William of Breteuil NERFINISHED ⓘ |
| closeCompanionOf | William the Conqueror NERFINISHED ⓘ |
| cousin | William the Conqueror NERFINISHED ⓘ |
| deathDate | 1071 ⓘ |
| deathPlace | Cassel, Flanders NERFINISHED ⓘ |
| diedIn | Battle of Cassel (1071) NERFINISHED ⓘ |
| familyName | FitzOsbern NERFINISHED ⓘ |
| father | Osbern the Steward NERFINISHED ⓘ |
| givenName | William ⓘ |
| heldTitleFrom | Earl of Hereford, circa 1067 ⓘ |
| introduced | Norman castle-building in the Welsh Marches ⓘ |
| landholdingsAfterConquest |
estates in Gloucestershire
ⓘ
estates in Herefordshire ⓘ estates in the Isle of Wight ⓘ extensive estates in the Welsh Marches ⓘ |
| mother | Emma of Ivry NERFINISHED ⓘ |
| nobleFamily | House of Normandy circle ⓘ |
| notableFor |
key role in the Norman Conquest of England
ⓘ
organizing the invasion of England in 1066 ⓘ supporting William the Conqueror’s claim to the English throne ⓘ |
| occupation |
military commander
ⓘ
royal advisor ⓘ |
| participatedIn |
Battle of Hastings
NERFINISHED
ⓘ
Norman Conquest of England NERFINISHED ⓘ |
| position |
one of the chief counselors of William the Conqueror
ⓘ
regent in Normandy during William’s absence in England ⓘ |
| regionOfActivity |
England
NERFINISHED
ⓘ
Flanders NERFINISHED ⓘ Normandy NERFINISHED ⓘ Welsh Marches NERFINISHED ⓘ |
| relative | William the Conqueror NERFINISHED ⓘ |
| roleInBattleOfHastings | senior commander under William the Conqueror ⓘ |
| spouse | Adeliza de Tosny NERFINISHED ⓘ |
| supported | William the Conqueror’s preparations for the 1066 invasion ⓘ |
| title |
Earl of Hereford
NERFINISHED
ⓘ
Lord of Breteuil NERFINISHED ⓘ Lord of Cormeilles NERFINISHED ⓘ Lord of Liseaux (in part of his career) 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: William FitzOsbern Description of subject: William FitzOsbern was an 11th-century Norman nobleman, close companion of William the Conqueror, and a key military leader in the Norman Conquest of England.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.