YourRoots by Genomelink
banner

Sign up to explore more

Create a free account to navigate family trees, view ancestors, and discover connections.

Iorwerth Drwyndwn ab Owain 1129–1175 – Genealogical Records

Birth Date: 1129

Birth Location: Aberffraw Castle, Aberffraw, Anglesey, Wales

Death Date: Aft. 1175

Death Location: Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father

Father: Owain Gwynedd

Mother: Gwladys Gwynedd

Spouse(s): Margred Madog

Children(s): Llywelyn Gwynedd

Iorwerth Drwyndwn ab Owain was born in 1129 in Aberffraw Castle, Aberffraw, Anglesey, Wales, the child of Owain Gwynedd Ap Gruffydd King Of Gwynedd And Gwladys Verch Llywarch Queen Of Gwynedd. Iorwerth Drwyndwn ab Owain married Margred Verch Madog, and had children including Llywelyn The Great Fawr Prince Of Gwynedd. Iorwerth Drwyndwn ab Owain passed away in 1175 in Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father.

Find more search results for Iorwerth Owain
IO

Reliability Score

This score reflects the reliability of the source family tree. A high rating indicates a trustworthy source with strong data consistency.

Reliability Score:
C
Criteria:
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
  • N/A 0 criteria (Insufficient)

This tree's reliability score:

  • Record available
  • Descendant's record available
  • Star tree owner

Biography

  • Iorwerth Drwyndwn ab Owain was born in 1129 in Aberffraw Castle, Aberffraw, Anglesey, Wales, the child of Owain Gwynedd Ap Gruffydd King Of Gwynedd And Gwladys Verch Llywarch Queen Of Gwynedd.
  • Iorwerth Drwyndwn ab Owain married Margred Verch Madog, and had children including Llywelyn The Great Fawr Prince Of Gwynedd.
  • Iorwerth Drwyndwn ab Owain passed away in 1175 in Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father.

Immediate Family

Parents

Spouses(s)

Children(s)

Iorwerth Owain's Ancestors

Self
Iorwerth Owain
1129–1175
Birth Place: Aberffraw Castle, Aberffraw, Anglesey, Wales
Parents
Owain Gwynedd ap Gruffydd King of Gwynedd
1100–1170
Caernarvonshire, Wales
Gwladys (verch Llywarch Queen of) Gwynedd
1098–1155
Arwystli, Montgomeryshire, Wales
Grandparents
Llywarch (ap) Trahaearn
1070–1145
Wales
Dyddgu (verch) Idnerth
1075–1100
Radnorshire, Wales
Great-Grandparents
Trahaearn Caradog
1035–1081
Nest Gruffudd
1050–
2nd-Great-Grandparents
Gruffudd Llewelyn
1007–1064
Ealdgyth Mercia
1034–1086

Iorwerth Owain's Descendants

1.
IO
Iorwerth (Drwyndwn ab) Owain (1129–Aft. 1175) m. Margred (verch) Madog (1150–1198)
  1. 1. Llywelyn ("the Great" Fawr Prince of) Gwynedd 1172–1240 m. unknown mistress 1191–1237
    1. 1. Elen 1230–1295 m. Donald Mar 1243–1297
      1. 1. Gartnait MacDomhnaill 1272–1305 m. Christina Bruce 1273–1357
        1. 1. Helena (de Mar) MacDomhnaill 1298–1342 m. Sir (John) Mentienth 1275–1323
        2. 2. Domhnall (of) Mar 1302–1342 m. Isabella Stewart 1308–1347
      2. 2. Margaret Mar 1273–1326 m. Malcolm (Lennox 5th Earl of) Lennox 1265–1333
        1. 1. Helen (Forrester Countess of) Lennox 1294– m. Donnachaid (Reamhar de Atholia Earl of) Atholl 1310–1355

Iorwerth Owain's Timeline

3 Records

1129
1129
Birth of Iorwerth Drwyndwn ab Owain in Aberffraw Castle, Aberffraw, Anglesey, Wales
Aberffraw Castle, Aberffraw, Anglesey, Wales
1175
Aft. 1175
Age 46
Death of Iorwerth Drwyndwn ab Owain in Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father
Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father
1184
1184
Age 55
Death of Iorwerth Drwyndwn ab Owain in Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father
Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: 1129
    Event Place: Aberffraw Castle, Aberffraw, Anglesey, Wales

    Genealogy Event 2
    Event Type: Death
    Event Date: 1184
    Event Place: Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father

    Genealogy Event 3
    Event Type: Death
    Event Date: Aft. 1175
    Event Place: Pennant Melangell, Powys, Wales, United Kingdom (He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father

About YourRoots

Family Tree Map

Explore your family tree geographically

Import your GEDCOM file to transform your family tree into an interactive global map. See your roots laid out visually and understand your true geographic heritage.

Powerful tools like "Trace Back To Me" instantly map your family's migration paths from a chosen ancestor all the way back to you.

LEARN MORE
AI Genealogy Research

Discover ancestors beyond "end-of-line" automatically

Import your family tree and let AI expand it for you. AI Ancestor Finder scans "end-of-line" ancestors to uncover their parents across hundreds of family lines at once. AI Deep Research analyzes selected ancestors and family clusters, suggesting relevant records and next steps.

Turn on Auto Research Mode to get new discoveries daily or weekly, so your tree keeps growing even while you're away.

LEARN MORE
DNA Match

Find more DNA matches across all DNA tests

Combine your DNA data with your family tree to unlock the full power of YourRoots DNA Match. Connect with relatives across major testing services — Ancestry, 23andMe, MyHeritage, and more.

View your matches' maps and trees to identify shared ancestors, and soon you'll be able to add them directly to your own tree and map.

LEARN MORE
Ancestry Reports

Ancestry DNA analysis that goes deeper than others

Unlock exclusive reports that reveal your deeper origins.

  • Deep Ancestry Report — Analyze 130+ ethnicities, sub-regions, and 1,800+ communities in one detailed view.
  • Global & Native American Reports — Developed with Stanford researchers to uncover hidden ancestries across all 22 chromosomes.
  • Ancient DNA Series — Compare your DNA with 1,000+ ancient genomes from Viking, Celtic, and early American civilizations.
LEARN MORE