de Raadt
E265443
computer programmer
free software developer
open-source software advocate
operating system developer
software engineer
de Raadt is the surname of Theo de Raadt, a software engineer best known as the founder and project leader of the OpenBSD operating system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| de Raadt canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2417417 — 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: de Raadt Context triple: [Theo de Raadt, familyName, de Raadt]
-
A.
Aeltge Velthuys
Aeltge Velthuys was the wife of Dutch Golden Age painter Carel Fabritius, known primarily through her connection to the artist.
-
B.
Sjaalman
Sjaalman is a fictional character in Multatuli’s novel "Max Havelaar," serving as an alter ego and narrative device to expose colonial abuses in the Dutch East Indies.
-
C.
Van der Madeweg
Van der Madeweg is a metro station in Amsterdam that serves as a stop on the city's rapid transit network.
-
D.
Halsema
Halsema is a Dutch surname most prominently associated with Femke Halsema, a politician who became the first female mayor of Amsterdam.
-
E.
De Croo
De Croo is a Belgian political family name most prominently associated with Alexander De Croo, the Prime Minister of Belgium.
- 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: de Raadt Target entity description: de Raadt is the surname of Theo de Raadt, a software engineer best known as the founder and project leader of the OpenBSD operating system.
-
A.
Aeltge Velthuys
Aeltge Velthuys was the wife of Dutch Golden Age painter Carel Fabritius, known primarily through her connection to the artist.
-
B.
Sjaalman
Sjaalman is a fictional character in Multatuli’s novel "Max Havelaar," serving as an alter ego and narrative device to expose colonial abuses in the Dutch East Indies.
-
C.
Van der Madeweg
Van der Madeweg is a metro station in Amsterdam that serves as a stop on the city's rapid transit network.
-
D.
Halsema
Halsema is a Dutch surname most prominently associated with Femke Halsema, a politician who became the first female mayor of Amsterdam.
-
E.
De Croo
De Croo is a Belgian political family name most prominently associated with Alexander De Croo, the Prime Minister of Belgium.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
computer programmer
ⓘ
free software developer ⓘ open-source software advocate ⓘ operating system developer ⓘ software engineer ⓘ |
| advocates |
open-source software
ⓘ
software freedom ⓘ |
| basedOn |
4.4BSD
ⓘ
NetBSD ⓘ |
| citizenship | Canada ⓘ |
| coFounderOf | NetBSD ⓘ |
| contributedTo | NetBSD ⓘ |
| countryOfBirth | South Africa ⓘ |
| countryOfResidence | Canada ⓘ |
| dateOfBirth | 1968-05-19 ⓘ |
| developed |
LibreSSL
ⓘ
OpenBGPD ⓘ OpenNTPD ⓘ OpenSSH ⓘ |
| employer |
OpenBSD Project
ⓘ
linked to:
OpenBSD
|
| familyName | de Raadt ⓘ |
| fieldOfWork |
computer security
ⓘ
networking software ⓘ open-source software ⓘ operating systems ⓘ |
| founderOf | OpenBSD ⓘ |
| givenName | Theo ⓘ |
| influenced |
security practices in Unix-like operating systems
ⓘ
widespread adoption of OpenSSH ⓘ |
| knownFor |
LibreSSL
ⓘ
OpenBGPD ⓘ OpenBSD operating system ⓘ
linked to:
OpenBSD
OpenNTPD ⓘ OpenSSH ⓘ code correctness emphasis ⓘ open and public development practices ⓘ strong security focus in OpenBSD ⓘ |
| languageSpoken | English ⓘ |
| nationality | Canadian ⓘ |
| notableWork |
OpenBSD security features
ⓘ
linked to:
OpenBSD
Proactive security and code auditing in OpenBSD ⓘ |
| operatingSystemDeveloped | OpenBSD ⓘ |
| operatingSystemFamily | BSD ⓘ |
| placeOfBirth |
Pretoria
ⓘ
linked to:
Pretoria, South Africa
|
| projectLeaderOf | OpenBSD ⓘ |
| residence | Calgary ⓘ |
| roleInProject |
OpenBSD architect
ⓘ
OpenBSD project leader ⓘ |
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: de Raadt Description of subject: de Raadt is the surname of Theo de Raadt, a software engineer best known as the founder and project leader of the OpenBSD operating system.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
de Raadt