Nielsen Hayden genealogy
Family: Llywelyn Fawr ap Iorwerth / Joan of England (F2856)
m. Bef 23 Mar 1205Iorwerth Drwyndwn ap Owain Gwynedd ( -1174) 
|
| John, King of England (1166-1216)
|
| Llywelyn Fawr ap Iorwerth (1173-1240)
|
Joan of England (1189-1236)
|
Gwladus Ddu ( -1251)  |
| Ellen of Wales ( -1253) |