Nielsen Hayden genealogy
(Unknown wife or mistress of Madog ap Maredudd)
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| Gronwy ab Ednyfed Fychan ap Cynwrig ab Iorwerth | |
| B: | of Trecasteil, Anglesey, Wales |
| D: | 1268 |
| Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd | |
| B: | Abt 1200 |
| Gruffudd ab Ednyfed Fychan ap Cynwrig ab Iorwerth | |
| D: | 1246 |
| Gwenllian ferch Yr Arglwydd Rhys | |
| D: | 1236 |
| Ednyfed Fychan ap Cynwrig ab Iorwerth ap Gwgon | |
| D: | 1246 |
| Owain ap Gruffudd ab Yr Arglwydd Rhys | |
| D: | 18 Jan 1236 |
| Strata Florida Abbey, Ceredigion, Wales | |
| Gruffudd ab Yr Arglwydd Rhys | |
| D: | 25 Jul 1201 |
| Strata Florida Abbey, Ceredigion, Wales | |
| Matilda de Briouze -1210 |
| Matilda de Briouze | |
| D: | 29 Dec 1210 |
| Llanbardarn Fawr, Ceredigion, Wales | |
| Gwenllian ferch Madog -1160 |
| Gwenllian ferch Madog | |
| D: | 1160 |
Rhys ap Gruffydd, King of Deheubarth Abt 1132-1197 |
| Rhys ap Gruffydd, King of Deheubarth | |
| B: | Abt 1132 |
| D: | 24 Apr 1197 |
| Madog ap Gruffudd ab Owain Brogyntyn ap Madog | |
| B: | Abt 1200 |
| Margaret ferch Llywelyn -1265 |
| Margaret ferch Llywelyn | |
| D: | 1265 |
| John de Brewes Abt 1197-1232 |
| John de Brewes | |
| B: | Abt 1197 |
| of Gower, Swansea, Wales | |
| M: | 1219 |
| D: | Between 1231 and 1232 |
| Walter IV de Clifford -Bef 1263 |
| Walter IV de Clifford | |
| B: | of Clifford, Herefordshire, England |
| M: | Bef 2 Nov 1234 |
| D: | Bef 23 Dec 1263 |
| Ellen -Aft 1294 |
| Ellen | |
| D: | Aft Feb 1294 |
| Donald of Mar -Aft 1297 |
| Donald of Mar | |
| D: | Aft 25 Jul 1297 |
| Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd | |
| B: | Abt 1200 |
| Llywelyn Fawr ap Iorwerth Abt 1173-1240 |
| Llywelyn Fawr ap Iorwerth | |
| B: | Abt 1173 |
| D: | 11 Apr 1240 |
| Aberconwy Abbey, Conwy, Wales | |
| Grufudd ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd | |
| D: | 1 Mar 1244 |
| Tower of London, London, England | |
| Gwladus Ddu -1251 |
| Gwladus Ddu | |
| D: | 1251 |
| Windsor, Berkshire, England | |
| Reynold de Briouze -1228 |
| Reynold de Briouze | |
| B: | of Abergavenny, Monmouthshire, Wales |
| M: | 1215 |
| D: | Between 1227 and 1228 |
| Ralph de Mortimer -1246 |
| Ralph de Mortimer | |
| B: | of Wigmore, Herefordshire, England |
| M: | Bef 26 Oct 1230 |
| D: | 6 Aug 1246 |
| Ellen of Wales -Bef 1253 |
| Ellen of Wales | |
| D: | Bef 24 Oct 1253 |
| Robert de Quincy Bef 1200-1257 |
| Robert de Quincy | |
| B: | Bef 1200 |
| of Wakes Colne, Essex, England | |
| M: | Bef 5 Dec 1237 |
| D: | Aug 1257 |
| Joan of England Bef 1190-1236 |
| Joan of England | |
| B: | Bef 1190 |
| M: | Bef 23 Mar 1205 |
| D: | 30 Mar 1236 |
| Eve Fitzwarine -Aft 1281 |
| Eve Fitzwarine | |
| M: | 1239 |
| D: | Aft 1281 |
| Iorwerth Drwyndwn ap Owain Gwynedd -Abt 1174 |
| Iorwerth Drwyndwn ap Owain Gwynedd | |
| D: | Abt 1174 |
| Madog ap Maredudd, Prince of Powys Fadog | |
| D: | 1160 |
| Winchester, Hampshire, England | |