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Margaret de Monthermer, 3rd Baroness Monthermer

English heiress and suo jure Baroness Monthermer

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 17, 2026
Entity authorityQ81879232 ↗
Source-derived summary

Margaret de Monthermer (14 October 1329 – 24 March 1394/1395) was an English heiress and suo jure Baroness Monthermer.

Life

In 1297 her grandfather Ralph de Monthermer had married Joan of Acre, to the displeasure of her father King Edward I. He had three children with Joan, and after her death, he was appointed Baron Monthermer. One of his sons was Thomas de Monthermer, Margaret's father.

Margaret was born on 14 October 1329. Thomas de Monthermer died in 1340 whilst fighting in the Battle of Sluys. Upon the death of her father, Margaret became suo jure Baroness Monthermer at the age of 10. She was also the heiress of Stokenham.

In 1343 Margaret married John de Montacute (later 1st Baron Montacute), a younger son of William Montagu, 1st Earl of Salisbury. She died on 24 March 1394 or 1395.

Editorial summary

Begin with the source’s own compact description: “Margaret de Monthermer, 3rd Baroness Monthermer” is english heiress and suo jure Baroness Monthermer. The dossier treats that line as a proposition to test through Margaret, Monthermer and Baroness, not as a finished interpretation.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1329, 1394, 1395, 1297—that can be checked directly. The linked authority record independently contributes the date 1329-01-01. For this dossier, Margaret, Monthermer and Baroness is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “english heiress and suo jure Baroness Monthermer” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 17, 2026. The linked authority identifier is Q81879232. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1329, 1394, 1395 and 1297.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Margaret de Monthermer, 3rd Baroness Monthermer”, its source revision and the description used here.
  2. Expand the search: follow Margaret de Monthermer, 3rd Baroness Monthermer primary sources, Margaret de Monthermer, 3rd Baroness Monthermer archive and Margaret research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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Source & attribution

This entry incorporates text from “Margaret de Monthermer, 3rd Baroness Monthermer” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.