| Iorwerth ap Gwgon | Gwenllian verch Rhirid |
| b. abt 1100, Of Betws-Yn-Rhos, Is Dulas, Denbighshire, Wales d. bur. occ. cen. im. . ud. |
b. abt 1102, Of Tref Rhirid, Arllechwedd Isaf, Caernarvonshire, Wales d. bur. occ. cen. im. . ud. |
| Cynwrig ap Iorwerth |