Ieuan was born about 1310 in Radyr, Glamorganshire, Cymru, the son of unknown parents.
His wife was Jonet verch Thomas. They were married, but the date and place have not been found. Their only known child was Llewellyn ap Ieuan (c1341-?).
| Event | Date | Details | Source | Multimedia | Notes | ||
|---|---|---|---|---|---|---|---|
| Birth | ABT 1310 |
|