Trehaern was the son of unknown parents. The date and place of his birth have not been found.
He died in 1079. The place is not known.
His wife was Nest verch Gruffydd. They were married, but the date and place have not been found. They had no known children.
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 1079 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | roi de Galles du Nord |