Sunday, January 25, 2026
Thompson Branch

Prince Of North Wales Llywelyn Ap Iorwerth

Male 1173 - 1240  (67 years)


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Generation: 1

  1. 1.  Prince Of North Wales Llywelyn Ap Iorwerth was born 1173, Dolwyddelan, Caernarvonshire, Wales; died 11 Apr 1240, Cistercian, Wales; was buried , Aberconwy, Wales.

    Llywelyn married Joan Abt 1204. (daughter of John Lackland Plantagenet and Isabel De Taillefer) was born Abt 1191; died 2 Feb 1237. [Group Sheet]

    Children:
    1. 2. Helen Ferch Llywelyn  Descendancy chart to this point was born Abt 1206; died 1253.
    2. 3. Gwladus Ferch Llywelyn  Descendancy chart to this point was born 1206; died 1251.
    3. 4. Dafdd Ap Llywelyn  Descendancy chart to this point was born Abt 1215, England; died 25 Feb 1246.
    4. 5. Margaret Ap Llywelyn  Descendancy chart to this point

    Llywelyn — (Unknown). [Group Sheet]

    Children:
    1. 6. Helen  Descendancy chart to this point


Generation: 2

  1. 2.  Helen Ferch Llywelyn Descendancy chart to this point (1.Llywelyn1) was born Abt 1206; died 1253.

    Helen — Domhnall I of Mar. Domhnall (son of William of Mar and Muriel) was born Abt 1243, Scotland; died Abt 1302, Scotland. [Group Sheet]

    Children:
    1. 7. Isabella of Mar  Descendancy chart to this point was born 1227; died Bef 1302, Scotland.
    2. 8. Alexander of Mar  Descendancy chart to this point
    3. 9. Duncan of Mar  Descendancy chart to this point
    4. 10. Garnait of Mar  Descendancy chart to this point was born , Scotland; died Bef Sep 1305, Scotland.
    5. 11. Margaret of Mar  Descendancy chart to this point

  2. 3.  Gwladus Ferch Llywelyn Descendancy chart to this point (1.Llywelyn1) was born 1206; died 1251.

    Gwladus married Ralph De Mortimer 1230. Ralph (son of Roger De Mortimer and Isabel De Ferrers) was born Bef 1198; died Bef 2 Oct 1246. [Group Sheet]

    Children:
    1. 12. Roger De Mortimer  Descendancy chart to this point was born 1231; died 30 Oct 1282; was buried Wigmore Abbey.
    2. 13. Hugh De Mortimer  Descendancy chart to this point
    3. 14. John De Mortimer  Descendancy chart to this point
    4. 15. Peter De Mortimer  Descendancy chart to this point

  3. 4.  Dafdd Ap Llywelyn Descendancy chart to this point (1.Llywelyn1) was born Abt 1215, England; died 25 Feb 1246.

  4. 5.  Margaret Ap Llywelyn Descendancy chart to this point (1.Llywelyn1)

  5. 6.  Helen Descendancy chart to this point (1.Llywelyn1)

    — I Domhnall. [Group Sheet]

    Children:
    1. 7. Isabella of Mar  Descendancy chart to this point was born 1227; died Bef 1302, Scotland.


Generation: 3

  1. 7.  Isabella of MarIsabella of Mar Descendancy chart to this point (2.Helen2, 1.Llywelyn1) was born 1227; died Bef 1302, Scotland.

    Isabella — Robert Bruce, I. Robert (son of Robert De Brus, VI and Margaret of Carrick) was born 11 Jul 1274, Kirkoswald, Ayrshire, Scotland; died 7 Jun 1329, Cardross, Dunbartonshire, Scotland; was buried , Dunfermline, Fife, Scotland. [Group Sheet]

    Children:
    1. 16. Marjorie Bruce  Descendancy chart to this point was born Dec 1296; died 2 Mar 1316; was buried , Paisley, Renfrewshire, Scotland.

  2. 8.  Alexander of Mar Descendancy chart to this point (2.Helen2, 1.Llywelyn1)

  3. 9.  Duncan of Mar Descendancy chart to this point (2.Helen2, 1.Llywelyn1)

  4. 10.  Garnait of Mar Descendancy chart to this point (2.Helen2, 1.Llywelyn1) was born , Scotland; died Bef Sep 1305, Scotland.

    Garnait — Christina Bruce. Christina (daughter of Robert De Brus, VI and Margaret of Carrick) was born Abt 1273, Seton, East Lothian, Scotland; died Abt 1356. [Group Sheet]

    Children:
    1. 17. Domhnall II of Mar  Descendancy chart to this point was born Abt 1302, Saline, Fife, Scotland; died 12 Aug 1332, Perth, Perthshire, Scotland.
    2. 18. Helen of Mar  Descendancy chart to this point was born , Scotland; died Aft 1342, Scotland.

  5. 11.  Margaret of Mar Descendancy chart to this point (2.Helen2, 1.Llywelyn1)

  6. 12.  Roger De Mortimer Descendancy chart to this point (3.Gwladus2, 1.Llywelyn1) was born 1231; died 30 Oct 1282; was buried Wigmore Abbey.

    Roger married Maud De Braose 1247. Maud (daughter of William De Braose and Eva Marshal) was born 1224; died 1301. [Group Sheet]

    Children:
    1. 19. Edmund De Mortimer  Descendancy chart to this point was born 1251; died 17 Jul 1304.
    2. 20. Ralph Mortimer  Descendancy chart to this point died 1276.
    3. 21. Isabella Mortimer  Descendancy chart to this point died 1292.
    4. 22. Margaret Mortimer  Descendancy chart to this point died 1297.
    5. 23. Roger Mortimer  Descendancy chart to this point died 1326.
    6. 24. Geoffrey Mortimer  Descendancy chart to this point
    7. 25. William Mortimer  Descendancy chart to this point

  7. 13.  Hugh De Mortimer Descendancy chart to this point (3.Gwladus2, 1.Llywelyn1)

  8. 14.  John De Mortimer Descendancy chart to this point (3.Gwladus2, 1.Llywelyn1)

  9. 15.  Peter De Mortimer Descendancy chart to this point (3.Gwladus2, 1.Llywelyn1)


Generation: 4

  1. 16.  Marjorie Bruce Descendancy chart to this point (7.Isabella3, 2.Helen2, 1.Llywelyn1) was born Dec 1296; died 2 Mar 1316; was buried , Paisley, Renfrewshire, Scotland.

    Marjorie — Walter Stewart. Walter (son of James Stewart and Egidia Burgh) was born Abt 1296; died 9 Apr 1327, Bathgate, West Lothian, Scotland. [Group Sheet]

    Children:
    1. 26. Robert II of Scotland  Descendancy chart to this point was born 2 Mar 1316, Paisley, Renfrewshire, Scotland; died 19 Apr 1390, Ayrshire, Scotland; was buried , Scone, Perthshire, Scotland.

  2. 17.  Domhnall II of Mar Descendancy chart to this point (10.Garnait3, 2.Helen2, 1.Llywelyn1) was born Abt 1302, Saline, Fife, Scotland; died 12 Aug 1332, Perth, Perthshire, Scotland.

    Domhnall — Isabella Stewart. Isabella (daughter of Alexander Stewart) was born Abt 1300, Scotland; died 1347, Scotland. [Group Sheet]

    Children:
    1. 27. Thomas of Mar  Descendancy chart to this point was born Abt 1330, Scotland; died 1377, Scotland.
    2. 28. Margaret of Mar  Descendancy chart to this point died Abt 1391.

  3. 18.  Helen of Mar Descendancy chart to this point (10.Garnait3, 2.Helen2, 1.Llywelyn1) was born , Scotland; died Aft 1342, Scotland.

  4. 19.  Edmund De Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1) was born 1251; died 17 Jul 1304.

    Edmund married Margaret De Fiennes Sep 1285. Margaret (daughter of William De Fiennes, II and Blanche De Brienne) was born Aft 1269; died 7 Feb 1333. [Group Sheet]

    Children:
    1. 29. Isolde De Mortimer  Descendancy chart to this point was born Abt 1271, Wigmore, Herefordshire, England; died 1328, Kidderminster, Worcestershire, England.
    2. 30. Roger Mortimer  Descendancy chart to this point was born 25 Apr 1287, Thornbury, Herefordshire, England; died 29 Nov 1330, Warwickshire, England.
    3. 31. Maude Mortimer  Descendancy chart to this point was born Abt 1286; died Bef 1316.
    4. 32. Edmund De Mortimer  Descendancy chart to this point

  5. 20.  Ralph Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1) died 1276.

  6. 21.  Isabella Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1) died 1292.

  7. 22.  Margaret Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1) died 1297.

  8. 23.  Roger Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1) died 1326.

  9. 24.  Geoffrey Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1)

  10. 25.  William Mortimer Descendancy chart to this point (12.Roger3, 3.Gwladus2, 1.Llywelyn1)