Career
Iorwerth received Nant Conwy as his inheritance from his father, Owain Gwynedd. However, he did not receive the crown succession, as was the normal tradition, because of his nose defect (his soubriquet "Trwyndwn" means broken-nosed). He was killed in battle at Pennant Melangell, in Powys, during the wars deciding the succession following the death of his father.
