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Roger De Mortimer, 3rd Baron Mortimer

Roger De Mortimer, 3rd Baron Mortimer

Male 1287 - 1330  (43 years)


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  • Name Roger De Mortimer 
    Suffix 3rd Baron Mortimer 
    Birth 3 May 1287  Thornbury, Herefordshire, England Find all individuals with events at this location 
    Christening 3 May 1287  Thornbury, Herefordshire, England Find all individuals with events at this location 
    Gender Male 
    Involvement with Queen Isabella of France While in exile in France, Roger Mortimer met Queen Isabella, who was estranged from her husband, Edward II. Both were already married — Mortimer to Joan de Geneville and Isabella to Edward — but their shared political goals and personal attraction led to a public alliance that became an intimate relationship. Chroniclers of the period widely accused them of being lovers, a scandal that shocked both the English and French courts. Their partnership was central to the success of the 1326 invasion, as Isabella used her royal position and French support, while Mortimer provided military leadership. Although some genealogical traditions suggest that Isabella may have borne Mortimer an illegitimate child during this period, no definitive historical record confirms the child’s identity. Their relationship ended with Mortimer’s execution in 1330, after which Isabella lived in relative seclusion. 
    _AMTID 342757352516:1030:209433258 
    _COLOR 25 
    _FSFTID LY16-VK3 
    _UID E52C623685874A69997E7EF5F87F061B8A17 
    Death 29 Nov 1330  Tyburn, Warwickshire, England, United Kingdom Find all individuals with events at this location 
    Address:
    Elms, Tyburn 
    Burial Aft 29 Nov 1330  Wigmore Abbey, Wigmore, Herefordshire, England Find all individuals with events at this location 
    Person ID I145080  World of Hyde
    Last Modified 24 Jan 2026 

    Father Knighted by King Edward I Edmund De Mortimer, 2nd Baron Of Wigmore,   b. 27 Oct 1252, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 17 Jul 1304, Wigmore, Herefordshire, England Find all individuals with events at this location (Age 51 years) 
    Mother Margaret De Fiennes,   b. Aft 1269, Fiennes, Pas-De-Calais, Nord-Pas-De-Calais, France Find all individuals with events at this locationd. 7 Feb 1333, Wigmore, Herefordshire, England Find all individuals with events at this location (Age < 62 years) 
    Marriage Sep 1285  Wigmore, Herefordshire, England Find all individuals with events at this location 
    Family ID F15834  Group Sheet  |  Family Chart

    Family Baroness Joan De Geneville,   b. 2 Feb 1285, Ludlow Castle, Shropshire, England Find all individuals with events at this locationd. 19 Oct 1356, King's Stanley, Lasboro, Gloucestershire, England Find all individuals with events at this location (Age 71 years) 
    Marriage 20 Sep 1301  Ludlow, Shropshire, England Find all individuals with events at this location 
    Children 
     1. Margaret De Mortimer, Baroness Berkeley,   b. 2 May 1304, Wigmore Castle-Herefordshire-England Find all individuals with events at this locationd. 5 May 1337, Thornbury, Berkeley Castle, Gloucestershire, England Find all individuals with events at this location (Age 33 years)
     2. Joan De Mortimer,   b. Abt 1306, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 5 May 1361, Wigmore, Herefordshire, England Find all individuals with events at this location (Age 55 years)
     3. Baron Mortimer Edmund De Mortimer,   b. 6 Oct 1306, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 16 Dec 1331, Stanton Lacy, Shropshire, England Find all individuals with events at this location (Age 25 years)
     4. Roger De Mortimer,   b. 1309, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 27 Aug 1338, Perth, Perthshire, Scotland Find all individuals with events at this location (Age 29 years)
     5. Blanche De Mortimer,   b. 1313, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 1347, Hereford, Herefordshire, England Find all individuals with events at this location (Age 34 years)
     6. Katherine De Mortimer, Countess Of Warwick,   b. 14 Feb 1313, Ludlow Castle, Shropshire, England Find all individuals with events at this locationd. 4 Aug 1369, Warwick, Warwickshire, England Find all individuals with events at this location (Age 56 years)
     7. Agnes De Mortimer,   b. Jan 1314, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 25 Jul 1368, London, Middlesex, Englalnd Find all individuals with events at this location (Age 54 years)
     8. Maud De Mortimer,   b. 1315, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 5 Jul 1345, Hereford, Herefordshire, England Find all individuals with events at this location (Age 30 years)
     9. Geoffrey De Mortimer,   b. 1318, Wigmore, Herefordshire, England Find all individuals with events at this locationd. 1372, Couhé, Vienne, Poitou-Charentes, France Find all individuals with events at this location (Age 54 years)
     10. Beatrice De Mortimer,   b. 1322   d. 16 Oct 1383, Wigmore, Herefordshire, England Find all individuals with events at this location (Age 61 years)
     11. Matilda De Mortimer,   b. 1328   d. Yes, date unknown
    Family ID F15932  Group Sheet  |  Family Chart
    Last Modified 15 Mar 2026 

  • Event Map
    Link to Google MapsBirth - 3 May 1287 - Thornbury, Herefordshire, England Link to Google Earth
    Link to Google MapsChristening - 3 May 1287 - Thornbury, Herefordshire, England Link to Google Earth
    Link to Google MapsMarriage - 20 Sep 1301 - Ludlow, Shropshire, England Link to Google Earth
     = Link to Google Earth 

  • Notes 


    • Life History of Roger Mortimer, 1st Earl of March:
      Roger Mortimer was born in 1287 into a powerful family with strong influence along the Welsh border. He inherited substantial estates and titles through his grandfather and father, becoming one of the most prominent nobles of his generation. Mortimer rose to military prominence during the reign of King Edward II, serving in campaigns in Ireland and against the Scots. Initially loyal to the king, Mortimer became disillusioned with Edward’s governance and the dominance of royal favorites, particularly Hugh Despenser the Younger. His opposition led to his arrest and imprisonment in the Tower of London in 1322. In 1323, he escaped to France, where he entered exile and began plotting Edward’s overthrow.

      In 1326, Mortimer returned to England with Queen Isabella of France at the head of an invasion force. Their campaign quickly succeeded, forcing Edward II to abdicate in favor of his son, Edward III. During Edward III’s minority, Mortimer effectively ruled England alongside Isabella, accumulating power and wealth. His dominance earned him many enemies, and in 1330 the young king seized power, had Mortimer arrested, and executed him for treason.

      While in exile in France, Roger Mortimer met Queen Isabella, who was estranged from her husband, Edward II. Both were already married — Mortimer to Joan de Geneville and Isabella to Edward — but their shared political goals and personal attraction led to a public alliance that became an intimate relationship. Chroniclers of the period widely accused them of being lovers, a scandal that shocked both the English and French courts. Their partnership was central to the success of the 1326 invasion, as Isabella used her royal position and French support, while Mortimer provided military leadership. Although some genealogical traditions suggest that Isabella may have borne Mortimer an illegitimate child during this period, no definitive historical record confirms the child’s identity. Their relationship ended with Mortimer’s execution in 1330, after which Isabella lived in relative seclusion.