King of Britain Sisillius
790 BC - 721 BCDrag or scroll to see more of the chart.
| Duke of Cornwall Prydain Ap Aedd Mawr 580 BC-Yes, date unknown |
| Duke of Cornwall Prydain Ap Aedd Mawr | |
| B: | 580 BC |
| D: | Yes, date unknown |
| Duke of Cornwall Aedd Mawr Ap Antonius 650 BC-Yes, date unknown |
| Duke of Cornwall Aedd Mawr Ap Antonius | |
| B: | 650 BC |
| D: | Yes, date unknown |
| Duke of Cornwall Antonius Ap Seisyll 720 BC-Yes, date unknown |
| Duke of Cornwall Antonius Ap Seisyll | |
| B: | 720 BC |
| D: | Yes, date unknown |
|
| King of Britain Sisillius 790 BC-721 BC |
| King of Britain Sisillius | |
| B: | 790 BC |
| D: | 721 BC |