Owain Gwynedd
(Notes: You may have to scroll down or right to see chart.)
| Helen Ferch Llywelyn | |
| B: | Abt 1206 |
| D: | 1253 |
| Domhnall I of Mar | |
| B: | Abt 1243 |
| Scotland | |
| D: | Abt 1302 |
| Scotland | |
| Gwladus Ferch Llywelyn | |
| B: | 1206 |
| D: | 1251 |
| Ralph De Mortimer | |
| B: | Bef 1198 |
| D: | Bef 2 Oct 1246 |
| Dafdd Ap Llywelyn | |
| B: | Abt 1215 |
| England | |
| D: | 25 Feb 1246 |
| Llywelyn Ap Iorwerth | |
| B: | 1173 |
| Dolwyddelan, Caernarvonshire, Wales | |
| D: | 11 Apr 1240 |
| Cistercian, Wales | |
| Joan | |
| B: | Abt 1191 |
| D: | 2 Feb 1237 |
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