Margaret de Monthermer, 3rd Baroness Monthermer

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

Margaret de Monthermer
suo jure Baroness Monthermer
Born14 October 1329
Died24 March 1394 or 1395
Spouse(s)John de Montacute, 1st Baron Montacute
IssueJohn Montacute, 3rd Earl of Salisbury
FatherThomas de Monthermer, 2nd Baron de Monthermer
MotherMargaret Teyes


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.[1]

Margaret was born on 14 October 1329.[2] Thomas de Monthermer died in 1340 whilst fighting in the Battle of Sluys.[1][3] Upon the death of her father, Margaret became suo jure Baroness Monthermer at the age of 10.[4] She was also the heiress of Stokenham.[2]

In 1343 Margaret married John de Montacute (later 1st Baron Montacute), a younger son of William Montagu, 1st Earl of Salisbury.[4] She died on 24 March 1394 or 1395.[2]


  1. ^ a b Kingsford 2004.
  2. ^ a b c Sheppard, Beall & Beall 2004, p. 12.
  3. ^ Weir 2008, p. 84.
  4. ^ a b Cokayne 1893, p. 352.
Works cited
  • Cokayne, George Edward, ed. (1893). Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom. Vol. 5. George Bell & Sons.
  • Kingsford, C. L. (2004). "Monthermer, Ralph de, first Lord Monthermer (d. 1325)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/19078. (Subscription or UK public library membership required.)
  • Sheppard, Walter Lee; Beall, William R.; Beall, Kaleen (2004). Ancestral Roots of Certain American Colonists who Came to America Before 1700 (8th ed.). Genealogical Publishing Company. ISBN 978-0-8063-1752-6.
  • Weir, Alison (2008). Britain's Royal Families, The Complete Genealogy. London: Vintage Books. ISBN 978-0-09-953973-5.