| Owain GWYNEDD | |
| B: | Abt 1110 |
| D: | 1170 |
| Llewelyn "Fawr" IOWERTH | |
| B: | Abt 1173 |
| , Anglesey, Wales | |
| D: | 11 Apr 1240 |
| Aberconway, Carnarvon, , WLS | |
| Joan (Joanna) OF ENGLAND | |
| B: | 1191 |
| M: | 1204 |
| D: | 2 Feb 1237 |
| Llyn Eglwystl, , , WLS | |
| Iowerth "Drwyndwn" AP OWAIN GWYNEDD | |
| B: | Abt 1140 |
| D: | Yes, date unknown |
| Gruffydd AP CYNAN | |
| B: | 1081 |
| D: | 1137 |
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