Family: Llewelyn of North Llewelyn, Prince of Wales / Princess Joan of England (F1977)
m. 1206Iorwerth Ap Owain (1130-1184) 
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Margaret of Powys Madog maret (1150- )
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| John I King of England (1167-1216)
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| Agatha de Ferrers (1168- )
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| Llewelyn of North Llewelyn, Prince of Wales (1173-1240)
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| Princess Joan of England (1188-1237)
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Gladys Dhu Verch Llewelyn (1194-1251)  |
| Wentelina Gwladus Princess North wales, "du" (1205-1251) |
| Helen Princess of North wales (1206-1253) |
| Helen Verch Llewelyn (1206-1253) |
| Margred Verch Llewelyn (1206- ) |
| Dafydd Prince of North wales (1209-1246) |
| Margaret Princess of North wales (1210- ) |