Jon Stephenson von Tetzchner
E51184
Jon Stephenson von Tetzchner is an Icelandic-Norwegian software developer and entrepreneur best known as the co-founder and longtime CEO of the Opera web browser company and later founder of the Vivaldi browser.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Jon Stephenson von Tetzchner canonical | 7 |
| von Tetzchner | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T400853 — 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: Jon Stephenson von Tetzchner Context triple: [Opera Software, foundedBy, Jon Stephenson von Tetzchner]
-
A.
Charles Geschke
Charles Geschke was an American computer scientist and entrepreneur best known as the co-founder of Adobe Systems and a pioneer of desktop publishing technologies.
-
B.
Tobias Nipkow
Tobias Nipkow is a German computer scientist known for his influential work in interactive theorem proving and formal verification, particularly through his contributions to the Isabelle proof assistant.
-
C.
Dave Tozer
Dave Tozer is a Grammy-winning American record producer, songwriter, and musician best known for his extensive work with John Legend and contributions to contemporary R&B and soul music.
-
D.
Edward Zuckerberg
Edward Zuckerberg is an American dentist and technology enthusiast best known as the father of Facebook co-founder Mark Zuckerberg.
-
E.
David Simas
David Simas is an American political strategist and former Obama White House official who serves as a top executive leader at the Obama Foundation.
- 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: Jon Stephenson von Tetzchner Target entity description: Jon Stephenson von Tetzchner is an Icelandic-Norwegian software developer and entrepreneur best known as the co-founder and longtime CEO of the Opera web browser company and later founder of the Vivaldi browser.
-
A.
Charles Geschke
Charles Geschke was an American computer scientist and entrepreneur best known as the co-founder of Adobe Systems and a pioneer of desktop publishing technologies.
-
B.
Tobias Nipkow
Tobias Nipkow is a German computer scientist known for his influential work in interactive theorem proving and formal verification, particularly through his contributions to the Isabelle proof assistant.
-
C.
Dave Tozer
Dave Tozer is a Grammy-winning American record producer, songwriter, and musician best known for his extensive work with John Legend and contributions to contemporary R&B and soul music.
-
D.
Edward Zuckerberg
Edward Zuckerberg is an American dentist and technology enthusiast best known as the father of Facebook co-founder Mark Zuckerberg.
-
E.
David Simas
David Simas is an American political strategist and former Obama White House official who serves as a top executive leader at the Obama Foundation.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
businessperson
ⓘ
entrepreneur ⓘ human ⓘ software developer ⓘ |
| associatedWith |
Opera Software
ⓘ
Vivaldi Technologies ⓘ |
| citizenship |
Iceland
ⓘ
Norway ⓘ |
| coFounded | Opera Software ⓘ |
| countryOfResidence | Iceland ⓘ |
| developed |
Opera web browser
ⓘ
Vivaldi web browser ⓘ |
| familyName |
von Tetzchner
ⓘ
linked to:
Jon Stephenson von Tetzchner
|
| fieldOfWork |
software industry
ⓘ
web browser development ⓘ |
| founded |
Vivaldi Technologies
ⓘ
linked to:
Brave Software
|
| givenName |
Jon
ⓘ
linked to:
Jonathan
|
| hasGender | male ⓘ |
| industry |
software
ⓘ
technology ⓘ |
| knownFor |
co-founding Opera Software
ⓘ
creating the Vivaldi web browser ⓘ founding Vivaldi Technologies ⓘ serving as CEO of Opera Software ⓘ |
| languageSpoken |
English
ⓘ
Icelandic ⓘ Norwegian ⓘ |
| name | Jon Stephenson von Tetzchner ⓘ |
| nationality |
Icelandic
ⓘ
Norwegian ⓘ |
| notableRole | longtime CEO of Opera Software ⓘ |
| notableWork |
Opera web browser
ⓘ
Vivaldi web browser ⓘ |
| occupation |
business executive
ⓘ
entrepreneur ⓘ software developer ⓘ |
| positionHeld |
Chief Executive Officer of Opera Software
ⓘ
Chief Executive Officer of Vivaldi Technologies ⓘ |
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: Jon Stephenson von Tetzchner Description of subject: Jon Stephenson von Tetzchner is an Icelandic-Norwegian software developer and entrepreneur best known as the co-founder and longtime CEO of the Opera web browser company and later founder of the Vivaldi browser.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Jon Stephenson von Tetzchner