460-546
| High King of Britain Constantine | |
| B: | 460 |
| D: | 546 |
430-500
| King of Dumnonia Tudvawl | |
| B: | 430 |
| D: | 500 |
390-Yes, date unknown
| Cynwal Ap Ffrwdwr, of Dumnonia | |
| B: | 390 |
| D: | Yes, date unknown |
432-Yes, date unknown
| Ffrwdwr Ap Gwrfawr, of Dumnonia | |
| B: | 432 |
| D: | Yes, date unknown |
414-Yes, date unknown
| Gwen Ferch Cunedda, of Gwenydd | |
| B: | 414 |
| D: | Yes, date unknown |
410-Yes, date unknown
| Amlawdd Wledig Ap Cynwal, of Dumnonia | |
| B: | 410 |
| D: | Yes, date unknown |
417-500
| King of Gwenydd Einion Yrth | |
| B: | 417 |
| North Wales, Wales, United Kingdom | |
| D: | 500 |
422-Yes, date unknown
| Prawst Ferch Tidlet, Wife, of Gwenydd | |
| B: | 422 |
| Powys, , Wales, United Kingdom | |
| D: | Yes, date unknown |
390-Yes, date unknown
| Gwawl Ferch Coel, of Britain | |
| B: | 390 |
| D: | Yes, date unknown |
386-460
| King of Gwenydd Cunedda Wledig | |
| B: | 386 |
| Cardigan, Wales, United Kingdom | |
| D: | 460 |
425-500
| King of Rheged Gurgust Lledlwm | |
| B: | 425 |
| D: | 500 |
427-Yes, date unknown
| King of North britain Mar Maeswig Gloff Ap Ceneu | |
| B: | 427 |
| D: | Yes, date unknown |
| King of Northern Britain, St. Ceneu | |
| B: | 404 |
| D: | 470 |
375-Yes, date unknown
| Ystradwel Ferch Cadfan Gadeon, of Dumnonia | |
| B: | 375 |
| D: | Yes, date unknown |
360-430
| King of Britain Coel Hen | |
| B: | 360 |
| D: | 430 |
|
360-450
| King of Dumnonia Gadeon | |
| B: | 360 |
| D: | 450 |