Causantín mac Fergusa
E188432
Causantín mac Fergusa was an early 9th-century king of the Picts whose reign marked a significant stage in the formation of the medieval kingdom that would become Scotland.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Causantín mac Fergusa canonical | 3 |
| Caustantín mac Fergusa | 1 |
| Constantín mac Cuiléin | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1553925 — 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: Causantín mac Fergusa Context triple: [Picts (early period), notableRuler, Causantín mac Fergusa]
-
A.
Áed Find
Áed Find was a king of Dál Riata in the 8th century, remembered in later tradition as an important ancestor of the Scottish royal line.
-
B.
Ailpín mac Echdach
Ailpín mac Echdach was a 9th-century Scottish noble traditionally regarded as the father of Kenneth MacAlpin, the first king to unite the Picts and Scots.
-
C.
Domnall mac Ailpín
Domnall mac Ailpín was a 9th-century king of the Picts (often regarded as an early king of Scotland) and a member of the Alpin dynasty who ruled after Kenneth MacAlpin.
-
D.
Eóganán mac Óengusa
Eóganán mac Óengusa was a 9th-century king of the Picts who ruled in what is now Scotland shortly before the rise of Kenneth MacAlpin and the formation of the Kingdom of Alba.
-
E.
Bridei mac Bili
Bridei mac Bili was a powerful 7th-century king of the Picts, best known for his military successes against the Northumbrians and for consolidating Pictish power in northern Britain.
- 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: Causantín mac Fergusa Target entity description: Causantín mac Fergusa was an early 9th-century king of the Picts whose reign marked a significant stage in the formation of the medieval kingdom that would become Scotland.
-
A.
Áed Find
Áed Find was a king of Dál Riata in the 8th century, remembered in later tradition as an important ancestor of the Scottish royal line.
-
B.
Ailpín mac Echdach
Ailpín mac Echdach was a 9th-century Scottish noble traditionally regarded as the father of Kenneth MacAlpin, the first king to unite the Picts and Scots.
-
C.
Domnall mac Ailpín
Domnall mac Ailpín was a 9th-century king of the Picts (often regarded as an early king of Scotland) and a member of the Alpin dynasty who ruled after Kenneth MacAlpin.
-
D.
Eóganán mac Óengusa
Eóganán mac Óengusa was a 9th-century king of the Picts who ruled in what is now Scotland shortly before the rise of Kenneth MacAlpin and the formation of the Kingdom of Alba.
-
E.
Bridei mac Bili
Bridei mac Bili was a powerful 7th-century king of the Picts, best known for his military successes against the Northumbrians and for consolidating Pictish power in northern Britain.
- F. None of above. chosen
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf |
9th-century monarch
ⓘ
King of the Picts ⓘ historical figure ⓘ |
| alsoKnownAs |
Constantín mac Fergusa
ⓘ
linked to:
Constantine I of Scotland
|
| associatedDynasty | Pictish royal kindreds ⓘ |
| associatedWith | formation of the medieval kingdom of Scotland ⓘ |
| chronologicalPlacement | early Middle Ages ⓘ |
| chronologyCertainty | approximate ⓘ |
| countryRuled | Pictland ⓘ |
| deathDate | c. 820 ⓘ |
| deathPlace | Pictland ⓘ |
| ethnicGroup |
Picts
ⓘ
linked to:
Picts (early period)
|
| father | Fergus ⓘ |
| floruit |
early 9th century
ⓘ
late 8th century ⓘ |
| gender | male ⓘ |
| historicalSignificance | represents a transitional phase from Pictish to Scottish kingship ⓘ |
| influenced | emergence of the Kingdom of Alba ⓘ |
| languageOfName | Old Gaelic ⓘ |
| linkedTo | early development of the Kingdom of Scotland ⓘ |
| nameInModernEnglish |
Constantine son of Fergus
ⓘ
linked to:
Constantine I of Scotland
|
| notableFor |
being an early 9th-century Pictish king
ⓘ
role in the development of the early Scottish kingdom ⓘ |
| partOf |
Pictish monarchy
ⓘ
linked to:
Picts (early period)
|
| positionHeld |
King of the Picts
ⓘ
linked to:
Rex Pictorum (King of the Picts)
|
| predecessor | Caustantín mac Fergusa’s predecessor is uncertain ⓘ |
| recordedIn |
Irish annals
ⓘ
linked to:
Annals of Tigernach
medieval Scottish chronicles ⓘ |
| region | northern Britain ⓘ |
| reignEnd | c. 820 ⓘ |
| reignStart | c. 789 ⓘ |
| religion | Christianity ⓘ |
| sourceStatus | known primarily from sparse annalistic references ⓘ |
| successor | Óengus II ⓘ |
| territorialBase | eastern and northern Scotland ⓘ |
| title | rex Pictorum ⓘ |
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: Causantín mac Fergusa Description of subject: Causantín mac Fergusa was an early 9th-century king of the Picts whose reign marked a significant stage in the formation of the medieval kingdom that would become Scotland.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Causantín mac Fergusa
linked to: Causantín mac Fergusa