Ceolwulf II of Mercia
E843676
Ceolwulf II of Mercia was a late 9th-century king of Mercia known for his brief and politically fragile reign during the period of Viking invasions in Anglo-Saxon England.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ceolwulf II of Mercia canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10002190 — 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: Ceolwulf II of Mercia Context triple: [Burgred of Mercia, successor, Ceolwulf II of Mercia]
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A.
Ceolwulf I of Mercia
Ceolwulf I of Mercia was a 9th-century Anglo-Saxon king who briefly ruled the powerful kingdom of Mercia during a period of political instability in early medieval England.
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B.
Beorhtwulf of Mercia
Beorhtwulf of Mercia was a 9th-century king of the Anglo-Saxon kingdom of Mercia, known for his troubled reign marked by Viking raids and internal instability.
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C.
Werburh of Mercia
Werburh of Mercia was a 7th-century Anglo-Saxon princess and abbess venerated as a Christian saint, particularly associated with the kingdom of Mercia and the city of Chester.
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D.
Ceolred of Mercia
Ceolred of Mercia was an early 8th-century king of the Anglo-Saxon kingdom of Mercia, known for his turbulent reign and association with the royal Iclingas dynasty.
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E.
Beornwulf of Mercia
Beornwulf of Mercia was a 9th-century king of the Anglo-Saxon kingdom of Mercia, noted for his brief and turbulent reign marked by military conflicts with Wessex and internal instability.
- 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: Ceolwulf II of Mercia Target entity description: Ceolwulf II of Mercia was a late 9th-century king of Mercia known for his brief and politically fragile reign during the period of Viking invasions in Anglo-Saxon England.
-
A.
Ceolwulf I of Mercia
Ceolwulf I of Mercia was a 9th-century Anglo-Saxon king who briefly ruled the powerful kingdom of Mercia during a period of political instability in early medieval England.
-
B.
Beorhtwulf of Mercia
Beorhtwulf of Mercia was a 9th-century king of the Anglo-Saxon kingdom of Mercia, known for his troubled reign marked by Viking raids and internal instability.
-
C.
Werburh of Mercia
Werburh of Mercia was a 7th-century Anglo-Saxon princess and abbess venerated as a Christian saint, particularly associated with the kingdom of Mercia and the city of Chester.
-
D.
Ceolred of Mercia
Ceolred of Mercia was an early 8th-century king of the Anglo-Saxon kingdom of Mercia, known for his turbulent reign and association with the royal Iclingas dynasty.
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E.
Beornwulf of Mercia
Beornwulf of Mercia was a 9th-century king of the Anglo-Saxon kingdom of Mercia, noted for his brief and turbulent reign marked by military conflicts with Wessex and internal instability.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
Anglo-Saxon monarch
ⓘ
historical figure ⓘ king of Mercia ⓘ |
| approximateDeathCentury | 9th century ⓘ |
| associatedWith | Viking Great Army NERFINISHED ⓘ |
| chronologicalOrder | one of the last independent Mercian kings ⓘ |
| conflictContext | Viking invasions of Anglo-Saxon England NERFINISHED ⓘ |
| contemporaryWith |
Alfred the Great
NERFINISHED
ⓘ
Great Heathen Army NERFINISHED ⓘ |
| continent | Europe ⓘ |
| country | Mercia NERFINISHED ⓘ |
| describedAs | puppet king of the Vikings ⓘ |
| describedIn | Anglo-Saxon Chronicle NERFINISHED ⓘ |
| ethnicGroup | Anglo-Saxon NERFINISHED ⓘ |
| gender | male ⓘ |
| governmentForm | monarchy ⓘ |
| historicalCertainty | poorly documented life ⓘ |
| historicalEra | Early Middle Ages NERFINISHED ⓘ |
| historicalRegion | Heptarchy NERFINISHED ⓘ |
| language | Old English ⓘ |
| locatedInTime | Anglo-Saxon England NERFINISHED ⓘ |
| monarchOf | Mercia NERFINISHED ⓘ |
| nativeRegion | England NERFINISHED ⓘ |
| notableFor |
brief reign
ⓘ
politically fragile rule ⓘ reigning during Viking invasions of England ⓘ |
| partOf | Anglo-Saxon kingdoms NERFINISHED ⓘ |
| politicalOutcome | end of independent Mercian kingship ⓘ |
| politicalStatus | client king of Viking leaders ⓘ |
| positionHeld | King of Mercia NERFINISHED ⓘ |
| powerBase | Mercian nobility ⓘ |
| predecessor | Burgred of Mercia NERFINISHED ⓘ |
| realm | Mercia NERFINISHED ⓘ |
| regionRuled | Midlands of England NERFINISHED ⓘ |
| reignEnd | 879 ⓘ |
| reignPeriod | late 9th century ⓘ |
| reignStart | 874 ⓘ |
| religion | Christianity ⓘ |
| sourceType | medieval chronicles ⓘ |
| successor | Æthelred, Lord of the Mercians NERFINISHED ⓘ |
| title | King ⓘ |
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: Ceolwulf II of Mercia Description of subject: Ceolwulf II of Mercia was a late 9th-century king of Mercia known for his brief and politically fragile reign during the period of Viking invasions in Anglo-Saxon England.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.