Margaret de Monthermer, 3rd Baroness Monthermer
English heiress and suo jure Baroness Monthermer

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.
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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.
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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.