Question: What is the date of death of Owain Ap Dafydd's father?
Sentence (from "Owain ap Dafydd"): Owain ap Dafydd , potential claimant to the title Prince of Gwynedd , was the younger son of Dafydd ap Gruffydd, the last free ruler of Gwynedd and the self-proclaimed Prince of Wales.
Relevant evidence: Yes