| Male Prince of Wales Llywelyn Fawr Ap Iowerth |
| Birth | 1173 | Dolwyddelan, Nantconwy, Wales, United Kingdom |
| Death | 11 Apr 1240 | |
| Burial | ||
| Marriage | ||
| Other Spouse | Tangwystyl Goch | F1522 | |
| Marriage | ||
| Father | Iowerth Drwyndwn Ap Owain Mawr | F1523 Group Sheet | |
| Mother | Margaret, of Powys | F1523 Group Sheet | |
| Female Joan Plantagenet |
| Birth | 1188 | London, Greater London, England, United Kingdom |
| Death | 2 Feb 1237 | Aberconway, Caernarvon, Wales, United Kingdom |
| Burial | ||
| Father | King of England John Plantagenet | F1976 Group Sheet | |
| Mother | Agatha Ferrers | F1976 Group Sheet | |