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| His Parents: | Her Parents: | ||
| Owain ap Gruffydd | Madog ap MAREDUDD King of Powys | ||
| Gwladus | Susann of Gwynedd | ||
| Iorwerth | Marared of POWYS | ||
| Bd | Bd | ||
| Bp | Bp | ||
| Dd | 1174 | Dd | |
| Bur | Bur | ||
| Occ | Occ | ||
| Their Children: | |||
| Llywelyn | Bd | 1173 | |
| Bd | |||
Iorwerth became Prince of Gwynedd in 1170 after the death of his father. He was known as "flat nose".
Information on this page from www.fmg.ac
Page updated 3rd November 2010