Joannes
E347861
Joannes was a late Western Roman usurper-emperor who briefly ruled from 423 to 425 AD before being overthrown by forces loyal to the Theodosian dynasty.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T3329788 — 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: Joannes Context triple: [Valentinian III, predecessor, Joannes]
-
A.
Johannes
Johannes is the given first name of Paul Kruger, the prominent 19th-century Boer leader and president of the South African Republic.
-
B.
Ioan
Ioan is a given name, commonly used in Romanian and other Eastern European languages, that corresponds to the English name John.
-
C.
Petrus
Petrus is the Latin form of the name Peter, historically used in religious and classical contexts and serving as the root for various European given names.
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D.
Theophilus
Theophilus was a prominent 6th-century Byzantine jurist and legal scholar who helped draft and interpret Emperor Justinian I’s codification of Roman law.
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E.
Theophilus
Theophilus was the first name of Bull Connor, the notorious Birmingham, Alabama public safety commissioner known for his brutal enforcement of racial segregation during the Civil Rights Movement.
- 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: Joannes Target entity description: Joannes was a late Western Roman usurper-emperor who briefly ruled from 423 to 425 AD before being overthrown by forces loyal to the Theodosian dynasty.
-
A.
Johannes
Johannes is the given first name of Paul Kruger, the prominent 19th-century Boer leader and president of the South African Republic.
-
B.
Ioan
Ioan is a given name, commonly used in Romanian and other Eastern European languages, that corresponds to the English name John.
-
C.
Petrus
Petrus is the Latin form of the name Peter, historically used in religious and classical contexts and serving as the root for various European given names.
-
D.
Theophilus
Theophilus was a prominent 6th-century Byzantine jurist and legal scholar who helped draft and interpret Emperor Justinian I’s codification of Roman law.
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E.
Theophilus
Theophilus is the otherwise unknown individual addressed in the prefaces of the Gospel of Luke and the Acts of the Apostles, likely a patron or symbolic “lover of God” to whom these New Testament works are dedicated.
- F. None of above. chosen
Statements (26)
| Predicate | Object |
|---|---|
| instanceOf |
Roman usurper emperor
ⓘ
Western Roman emperor ⓘ |
| capital | Ravenna ⓘ |
| conflict | civil war in the Western Roman Empire (423–425) ⓘ |
| country | Western Roman Empire ⓘ |
| deathDate | 425 ⓘ |
| deathPlace | Ravenna ⓘ |
| dynasty | none (usurper, not of the Theodosian dynasty) ⓘ |
| givenName | Joannes ⓘ |
| legitimacy | considered a usurper by the Theodosian court ⓘ |
| notableEvent |
brief rule as Western Roman emperor from 423 to 425
ⓘ
overthrow and execution after intervention of the Eastern court ⓘ |
| occupation | emperor ⓘ |
| opponent |
Galla Placidia
ⓘ
Theodosian dynasty ⓘ Theodosius II ⓘ |
| opposedBy |
Eastern Roman Empire
ⓘ
linked to:
Byzantine Empire
|
| overthrownBy |
army of the Eastern Roman Empire
ⓘ
linked to:
Byzantine armed forces
forces loyal to Theodosius II ⓘ |
| positionHeld |
Western Roman emperor
ⓘ
linked to:
Western Roman emperors
|
| predecessor | Honorius ⓘ |
| reignEnd | 425 ⓘ |
| reignStart | 423 ⓘ |
| seizedPowerAfter | death of Honorius ⓘ |
| successor | Valentinian III ⓘ |
| supportedBy | some Western Roman aristocrats ⓘ |
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: Joannes Description of subject: Joannes was a late Western Roman usurper-emperor who briefly ruled from 423 to 425 AD before being overthrown by forces loyal to the Theodosian dynasty.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.