Margaret Mortimer
E524644
Margaret Mortimer was a medieval English noblewoman of the powerful Mortimer family, daughter of Roger Mortimer, 1st Earl of March, and a figure in the aristocratic networks surrounding the reign of Edward II and Edward III.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Margaret Mortimer canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5492386 — 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: Margaret Mortimer Context triple: [Roger Mortimer, 1st Earl of March, child, Margaret Mortimer]
-
A.
Katherine Mortimer
Katherine Mortimer was a 14th-century English noblewoman, daughter of the powerful Marcher lord Roger Mortimer, 1st Earl of March, and a member of the influential Mortimer family during the reign of Edward III.
-
B.
Marjorie, Countess of Carrick
Marjorie, Countess of Carrick, was a 13th-century Scottish noblewoman best known as the mother of King Robert the Bruce and a key figure in the lineage of the Scottish royal house.
-
C.
Joan Beaufort, Queen of Scots
Joan Beaufort, Queen of Scots, was an English noblewoman who became queen consort through her marriage to King James I of Scotland and played a significant political role as his wife and later as regent for their son.
-
D.
Margaret de Clare
Margaret de Clare was an English noblewoman of the late 13th and early 14th centuries, notable as a member of the powerful de Clare family and through her politically significant marriages into the English aristocracy.
-
E.
Elizabeth de Clare
Elizabeth de Clare was a 14th-century English noblewoman and wealthy heiress whose endowment helped found and shape Clare College at the University of Cambridge.
- 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: Margaret Mortimer Target entity description: Margaret Mortimer was a medieval English noblewoman of the powerful Mortimer family, daughter of Roger Mortimer, 1st Earl of March, and a figure in the aristocratic networks surrounding the reign of Edward II and Edward III.
-
A.
Katherine Mortimer
Katherine Mortimer was a 14th-century English noblewoman, daughter of the powerful Marcher lord Roger Mortimer, 1st Earl of March, and a member of the influential Mortimer family during the reign of Edward III.
-
B.
Marjorie, Countess of Carrick
Marjorie, Countess of Carrick, was a 13th-century Scottish noblewoman best known as the mother of King Robert the Bruce and a key figure in the lineage of the Scottish royal house.
-
C.
Joan Beaufort, Queen of Scots
Joan Beaufort, Queen of Scots, was an English noblewoman who became queen consort through her marriage to King James I of Scotland and played a significant political role as his wife and later as regent for their son.
-
D.
Margaret de Clare
Margaret de Clare was an English noblewoman of the late 13th and early 14th centuries, notable as a member of the powerful de Clare family and through her politically significant marriages into the English aristocracy.
-
E.
Elizabeth de Clare
Elizabeth de Clare was a 14th-century English noblewoman and wealthy heiress whose endowment helped found and shape Clare College at the University of Cambridge.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
English noble
ⓘ
medieval person ⓘ noblewoman ⓘ |
| associatedWith |
Berkeley family
NERFINISHED
ⓘ
House of Mortimer NERFINISHED ⓘ reign of Edward II of England ⓘ reign of Edward III of England ⓘ |
| child |
Isabel de Berkeley
NERFINISHED
ⓘ
Joan de Berkeley NERFINISHED ⓘ Maurice de Berkeley, 4th Baron Berkeley NERFINISHED ⓘ Roger de Berkeley NERFINISHED ⓘ Thomas de Berkeley (son of Thomas de Berkeley, 3rd Baron Berkeley) NERFINISHED ⓘ |
| countryOfCitizenship | Kingdom of England ⓘ |
| dateOfBirth | circa 1304 ⓘ |
| dateOfDeath | between 1337 and 1347 ⓘ |
| era | Late Middle Ages ⓘ |
| ethnicGroup | English ⓘ |
| familyName | Mortimer NERFINISHED ⓘ |
| father | Roger Mortimer, 1st Earl of March NERFINISHED ⓘ |
| floruit | early 14th century ⓘ |
| givenName | Margaret ⓘ |
| languageOfExpression | Middle English ⓘ |
| marriage | married Thomas de Berkeley, 3rd Baron Berkeley, in the early 14th century ⓘ |
| memberOf | Mortimer family NERFINISHED ⓘ |
| mother | Joan de Geneville, 2nd Baroness Geneville NERFINISHED ⓘ |
| nobleRank | baronial nobility ⓘ |
| nobleTitleHeldByMarriage | Baroness Berkeley NERFINISHED ⓘ |
| notableFor |
being a daughter of Roger Mortimer, 1st Earl of March
ⓘ
marriage alliance between the Mortimer and Berkeley families ⓘ |
| participatedIn |
aristocratic networks during the reign of Edward II of England
ⓘ
aristocratic networks during the reign of Edward III of England ⓘ |
| placeOfBirth | England ⓘ |
| positionInFamily |
daughter of Joan de Geneville
ⓘ
daughter of Roger Mortimer, 1st Earl of March ⓘ |
| relative |
Edward II of England
NERFINISHED
ⓘ
Edward III of England NERFINISHED ⓘ Isabella of France NERFINISHED ⓘ Joan de Geneville, 2nd Baroness Geneville NERFINISHED ⓘ Maurice de Berkeley, 4th Baron Berkeley NERFINISHED ⓘ Roger Mortimer, 1st Earl of March NERFINISHED ⓘ Roger Mortimer, 2nd Earl of March NERFINISHED ⓘ Thomas de Berkeley, 3rd Baron Berkeley NERFINISHED ⓘ |
| religion | Roman Catholicism ⓘ |
| sexOrGender | female ⓘ |
| socialClass | high nobility ⓘ |
| spouse | Thomas de Berkeley, 3rd Baron Berkeley NERFINISHED ⓘ |
| title | Lady Berkeley 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: Margaret Mortimer Description of subject: Margaret Mortimer was a medieval English noblewoman of the powerful Mortimer family, daughter of Roger Mortimer, 1st Earl of March, and a figure in the aristocratic networks surrounding the reign of Edward II and Edward III.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.