The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
 MaleIestyn ap Gwrgan, arglwydd of Morgannwg |
| Birth | Abt 1030 | of, , Glamorganshire, Wales  |
| Christening | {Tribe: Iestyn ap Gwrgan} |
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| Death | Monastery of Llangenys, , Monmouthshire, Wales |
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| Burial | ||
| Marriage | ||
| Other Spouse | Denis ferch Bleddyn | F141612 | |
| Marriage | Yes, date unknown | |
| Other Spouse | Constance "Wen" ferch Cadwgon | F141624 | |
| Marriage | ||
| Father | ||
| Mother | ||
![Dyddgu [1st] ferch Iorwerth](img/female.jpg) FemaleDyddgu [1st] ferch Iorwerth |
| Birth | Abt 1070 | of, , Radnorshire, Wales |
| Christening | {Tribe: Elystan Glodrydd} |
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| Death | Yes, date unknown | |
| Burial | ||
| Father | ||
| Mother | ||
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