Iorwerth was the son of unknown parents. The date and place of his birth have not been found.
He died about 1295. The place is not known.
His wife was Gwenllian verch Ithel Vychan. They were married, but the date and place have not been found. Their two known children were Gwenllian verch Iorwerth (c1291-?) and Gronwy ap Iorwerth (c1300-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | ABT 1295 |
|