| | Christiana Mowbray 1305–1362 William DePlumpton 1294–1362 | | |
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| | WilliamII deBraiose …–1326 | | |
| | William deBreuse 1224–AD 1290/91 | | | | | Margaret verchLlewelyn 1208–… | | | | Llywelyn Fawr Aberffraw 1173–1240 Tangwystl ferch Llywarch …–… Joanna of England 1210–1236 | | | | Iowerth Drwyndwn Gwynedd 1130–1174 | | | | Owain Fawr Gwynedd 1087–1169 Gwladys ferch Llywarch …–… | | |
| | | Madog Powys ap Maredydd …–… Susanna verch Gruffydd 1095–… | | |
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| | | John Lackland King of England 1166–1216 Isabella Taillefer of Angouleme 1188–1246 | | | | HenryII King of England 1133–1189 Eleanor Duchess of Aquitaine 1122–1204 | | |
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