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Gwladus ferch Llywarch
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About
Gwladus ferch Llywarch, first wife of Owain Gwynedd, was mother of Iorwerth Drwyndwn and so grandmother of Llywelyn the Great.
Research notes
✓ standard: GWLADUS, dau. of Llywarch ap Trahaearn (OPEN ~); 1st wife of Owain Gwynedd (existing F99946); mother of Iorwerth Drwyndwn (our line - accepted reading). Added 14 Sep 2026.