Joanna of Castile
E45415
House of Trastámara
Queen of Aragon
Queen of Castile
Roman Catholic
Spanish monarch
human
queen regnant
Joanna of Castile, also known as Joanna the Mad, was a queen of Castile and Aragon whose reign marked the dynastic union that led to a unified Spain, though she spent much of her life confined due to alleged mental illness.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Joanna of Castile canonical | 38 |
| Joanna I of Castile | 2 |
| Juana I de Castilla | 2 |
| Juana la Loca | 2 |
| Joanna of Castile (titular) | 1 |
| Juana de Castilla | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T304529 — 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: Joanna of Castile Context triple: [Charles I of Spain, mother, Joanna of Castile]
-
A.
Isabella I of Castile
Isabella I of Castile was the late 15th-century queen of Castile and León who, alongside her husband Ferdinand II of Aragon, completed the Reconquista, sponsored Christopher Columbus’s 1492 voyage, and centralized royal power in what became a unified Spain.
-
B.
Order of Isabella the Catholic
The Order of Isabella the Catholic is a Spanish civil order of chivalry granted in recognition of extraordinary services that benefit the nation or contribute to friendly relations and cooperation between Spain and the international community.
-
C.
Maria Theresa of Spain
Maria Theresa of Spain was a 17th-century Spanish Habsburg princess who became Queen of France as the wife of Louis XIV and played a key dynastic role in European politics.
-
D.
Ferdinand II of Aragon
Ferdinand II of Aragon was a late 15th- and early 16th-century Catholic monarch of Spain who, alongside Isabella I of Castile, completed the Reconquista and laid the foundations of a unified Spanish kingdom and overseas empire.
-
E.
Isabel Segunda
Isabel Segunda is the main town and administrative center of the Puerto Rican island municipality of Vieques.
- 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: Joanna of Castile Target entity description: Joanna of Castile, also known as Joanna the Mad, was a queen of Castile and Aragon whose reign marked the dynastic union that led to a unified Spain, though she spent much of her life confined due to alleged mental illness.
-
A.
Isabella I of Castile
Isabella I of Castile was the late 15th-century queen of Castile and León who, alongside her husband Ferdinand II of Aragon, completed the Reconquista, sponsored Christopher Columbus’s 1492 voyage, and centralized royal power in what became a unified Spain.
-
B.
Order of Isabella the Catholic
The Order of Isabella the Catholic is a Spanish civil order of chivalry granted in recognition of extraordinary services that benefit the nation or contribute to friendly relations and cooperation between Spain and the international community.
-
C.
Maria Theresa of Spain
Maria Theresa of Spain was a 17th-century Spanish Habsburg princess who became Queen of France as the wife of Louis XIV and played a key dynastic role in European politics.
-
D.
Ferdinand II of Aragon
Ferdinand II of Aragon was a late 15th- and early 16th-century Catholic monarch of Spain who, alongside Isabella I of Castile, completed the Reconquista and laid the foundations of a unified Spanish kingdom and overseas empire.
-
E.
Isabel Segunda
Isabel Segunda is the main town and administrative center of the Puerto Rican island municipality of Vieques.
- F. None of above. chosen
Statements (66)
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: Joanna of Castile Description of subject: Joanna of Castile, also known as Joanna the Mad, was a queen of Castile and Aragon whose reign marked the dynastic union that led to a unified Spain, though she spent much of her life confined due to alleged mental illness.
Referenced by (46)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Juana de Castilla
this entity surface form:
Juana la Loca
this entity surface form:
Joanna I of Castile
this entity surface form:
Joanna I of Castile
this entity surface form:
Juana I de Castilla
this entity surface form:
Juana la Loca
subject surface form:
Castle of La Mota
this entity surface form:
Joanna of Castile (titular)
this entity surface form:
Juana I de Castilla
subject surface form:
La Beltraneja