Family: Iorwerth Hirflawdd ap Tegonwy / Arianwen ferch Brychan (F5226)
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 | Tegonwy ap Teon (735- ) |
 | Gwladus ferch Hwfa (705- ) |
| Caenog ap Tegonwy (760- )  |
| Iorwerth Hirflawdd ap Tegonwy (765- )
|
| Arianwen ferch Brychan (775- ) |
| Idnerth ap Iorwerth (795- ) |
| Cynog Mawr ap Iowerth (810- ) |