Iorwerth Drwyndwn ap Owain
1145 - Abt 1174 (30 years)
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| Princess Helen of North Wales | |
| B: | Abt 1246 |
| North Wales | |
| D: | Aft 1295 |
| Donald of Mar | |
| B: | Abt 1243 |
| Kildrummy, Aberdeenshire, Scotland | |
| D: | Aft 25 Jul 1297 |
| Dafydd ap Llewelyn | |
| B: | Abt 1208 |
| Walesey, Caernarvonshire, Wales | |
| D: | 25 Feb 1246 |
| Wales | |
| Isabella de Braose | |
| B: | Abt 1238 |
| Castle Bramber, Arundel, Sussex, England | |
| D: | UNKNOWN |
| Llewelyn ap Iorwerth | |
| B: | 1173 |
| Castle Aberffraw, Caernarvonshire, Wales | |
| D: | 11 Apr 1240 |
| Aberconwy, Arllechwedd Isaf, Caernarvonshire, Wales | |
| Joan Plantagenet | |
| B: | Abt 1188 |
| London, Middlesex, England | |
| D: | Feb 1237 |
| Aberconwy, Arllechwedd Isaf, Caernarvonshire, Wales | |
|
| Iorwerth Drwyndwn ap Owain | |
| B: | Between 1144 and 1145 |
| Castle Aberffraw, Anglesey, Wales | |
| D: | Abt 1174 |
| Wales | |
| Marared Verch Madog | |
| B: | Abt 1129 |
| Montgomeryshire, Wales | |
| D: | UNKNOWN |
| Wales | |