usurper emperor Eugenius
E949247
Usurper emperor Eugenius was a late 4th-century Roman official who, backed by the general Arbogast, briefly ruled the Western Roman Empire in opposition to the legitimate emperor Theodosius I before being defeated and killed.
All labels observed (1)
| Label | Occurrences |
|---|---|
| usurper emperor Eugenius canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11844204 — 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: usurper emperor Eugenius Context triple: [Arbogast, associatedWith, usurper emperor Eugenius]
-
A.
Majorian
Majorian was a 5th-century Western Roman emperor noted for his energetic but ultimately unsuccessful efforts to restore the crumbling empire through military campaigns and administrative reforms.
-
B.
Julius Avitus Alexianus
Julius Avitus Alexianus was a Roman senator and aristocrat of the early 3rd century, best known as the husband of Julia Maesa and thus connected to the Severan imperial family.
-
C.
Valentinian I
Valentinian I was a 4th-century Roman emperor (reigned 364–375 AD) known for strengthening the empire’s frontiers and defending the Western Roman Empire against Germanic invasions.
-
D.
Numerian
Numerian was a Roman emperor of the late 3rd century who briefly ruled the eastern half of the empire before his mysterious death in 284 AD.
-
E.
Magnentius
Magnentius was a Roman usurper and military commander who seized control of much of the Western Roman Empire in the mid-4th century before being defeated by Emperor Constantius II.
- 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: usurper emperor Eugenius Target entity description: Usurper emperor Eugenius was a late 4th-century Roman official who, backed by the general Arbogast, briefly ruled the Western Roman Empire in opposition to the legitimate emperor Theodosius I before being defeated and killed.
-
A.
Majorian
Majorian was a 5th-century Western Roman emperor noted for his energetic but ultimately unsuccessful efforts to restore the crumbling empire through military campaigns and administrative reforms.
-
B.
Julius Avitus Alexianus
Julius Avitus Alexianus was a Roman senator and aristocrat of the early 3rd century, best known as the husband of Julia Maesa and thus connected to the Severan imperial family.
-
C.
Valentinian I
Valentinian I was a 4th-century Roman emperor (reigned 364–375 AD) known for strengthening the empire’s frontiers and defending the Western Roman Empire against Germanic invasions.
-
D.
Numerian
Numerian was a Roman emperor of the late 3rd century who briefly ruled the eastern half of the empire before his mysterious death in 284 AD.
-
E.
Magnentius
Magnentius was a Roman usurper and military commander who seized control of much of the Western Roman Empire in the mid-4th century before being defeated by Emperor Constantius II.
- F. None of above. chosen
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
Roman usurper emperor
ⓘ
Western Roman emperor ⓘ |
| ally | Arbogast NERFINISHED ⓘ |
| appointedBy | Arbogast NERFINISHED ⓘ |
| battle | Battle of the Frigidus NERFINISHED ⓘ |
| causeOfDeath | Execution after defeat at the Battle of the Frigidus ⓘ |
| centuryOfActivity | 4th century ⓘ |
| conflict | Civil war between Theodosius I and Eugenius ⓘ |
| country | Western Roman Empire NERFINISHED ⓘ |
| deathDate | 394 ⓘ |
| deathPlace | Frigidus River NERFINISHED ⓘ |
| defeatedBy | Theodosius I NERFINISHED ⓘ |
| endTime | 394 ⓘ |
| era | Late Antiquity ⓘ |
| ethnicGroup | Roman ⓘ |
| givenName | Eugenius NERFINISHED ⓘ |
| killedBy | soldiers of Theodosius I ⓘ |
| mannerOfDeath | Execution ⓘ |
| notableEvent | Usurpation of the Western Roman Empire NERFINISHED ⓘ |
| notableWork | Restoration of pagan altars and temples in Rome ⓘ |
| occupation | Roman official ⓘ |
| opponent |
Eastern Roman Empire
NERFINISHED
ⓘ
Theodosius I NERFINISHED ⓘ |
| opposedBy | Theodosius I NERFINISHED ⓘ |
| positionHeld | Roman emperor of the West ⓘ |
| predecessor | Valentinian II NERFINISHED ⓘ |
| reign | 392–394 ⓘ |
| religion | Paganism ⓘ |
| residence | Milan NERFINISHED ⓘ |
| startTime | 392 ⓘ |
| successor | Honorius NERFINISHED ⓘ |
| supportedBy | Arbogast 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: usurper emperor Eugenius Description of subject: Usurper emperor Eugenius was a late 4th-century Roman official who, backed by the general Arbogast, briefly ruled the Western Roman Empire in opposition to the legitimate emperor Theodosius I before being defeated and killed.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.