See also
| Partner: | Arthen ap SEISYLL (c. 735-807) | |
| Partner: | (unknown) | |
| Children: | Dyfnwallon ap ARTHEN (c. 765-841) | |
| Name: | Arthen ap SEISYLL | |
| Sex: | Male | |
| Father: | Seisyll ap CLYDOG (c. 700-740) | |
| Mother: | - | |
| Birth | c. 0735 | |
| Death | 0807 (age 71-72) | |
| Name: | Dyfnwallon ap ARTHEN | |
| Sex: | Male | |
| Birth | c. 0765 | Ceredigion, Wales |
| Death | 0841 (age 75-76) | Ceredigion, Wales |