Mary de Monthermer, Countess of Fife

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Mary de Monthermer, Countess of Fife

Also Known As: "Mary de Mortimer"
Death: March 30, 1371 (73)
Dunfirmline Castle, Fifeshire, Scotland
Immediate Family:

Daughter of Ralph, 1st Baron Monthermer and Joan of Acre
Wife of Duncan IV, 10th Earl of Fife
Mother of Isabella MacDuff, Countess of Fife and Janet Gifford
Sister of Joan de Monthermer, Nun at Amesbury; Thomas, 2nd Baron de Monthermer; Edward de Monthermer, 3rd Baron Monthermer and (Stillborn) de Monthermer
Half sister of Gilbert de Clare, 8th Earl of Gloucester; Eleanor de Clare, Baroness Despenser; Margaret de Clare, Countess of Gloucester and Elizabeth de Clare

Managed by: Scott David Hibbard
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About Mary de Monthermer, Countess of Fife

Mary de Monthermer, Countess of Fife (October 1297 – circa 1371) was an English noblewoman.

Parents: She was a daughter of Ralph de Monthermer, 1st Baron Monthermer and his wife Joan of Acre.


  1. In 1306-07, her grandfather Edward I and uncle Edward, Prince of Wales arranged for her to wed Duncan Macduff, 8th Earl of Fife (1289–1353).[2][6] A papal dispensation was granted in 4 November 1307.[1][6][original research?] A posthumous child, Duncan had spent his minority in England.[6] As was common for the time, she was very young - only nine years old. They had one surviving daughter, who was born fourteen years after they married. She would come to inherit Duncan's lands:


  1. Isabella, Countess of Fife (sometimes called Elizabeth)[2] (1320–1389); married four times with no issue.
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Mary de Monthermer, Countess of Fife's Timeline

October 1297
Age 22
Dunfermline, Fife, Scotland
March 30, 1371
Age 73
Fifeshire, Scotland