Family: Prince Of North Wales Llywelyn Ap Iorwerth / Princess of Wales and Lady of Snowdon Joan (F141)
King Of England John Lackland Plantagenet (1167-1216) 
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Isabel De Taillefer (1175-1246)
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King Of England Henry III Plantagenet (1206-1272)  |
| Princess of Wales and Lady of Snowdon Joan (1191-1237)
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| Prince Of North Wales Llywelyn Ap Iorwerth (1173-1240)
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| Helen Ferch Llywelyn (1206-1253) |
| Princess Gwladus Ferch Llywelyn (1206-1251) |
| Prince of Gwynedd Dafdd Ap Llywelyn (1215-1246) |
