365-425
| Duke of Cornwall Owain Finddu | |
| B: | 365 |
| D: | 425 |
367-Yes, date unknown
| King of Dyfed Annun Dyfed Ap Maxen | |
| B: | 367 |
| D: | Yes, date unknown |
388-Yes, date unknown
| Sevira Ferch Maxen, of Brita | |
| B: | 388 |
| D: | Yes, date unknown |
390-480
| High King of Britain Vortigern | |
| B: | 390 |
| D: | 480 |
340-388
| Emperor of Brita Maxen Wledig | |
| B: | 340 |
| D: | 388 |
350-Yes, date unknown
| Elen Ferch Eudaf, of Rome | |
| B: | 350 |
| D: | Yes, date unknown |
320-Yes, date unknown
| Maximian Constans, of Brita | |
| B: | 320 |
| D: | Yes, date unknown |
|
288-337
| Emperor of Rome Constantine, I | |
| B: | 27 Feb 288 |
| Naissus, Serbia | |
| D: | 22 May 337 |
| Macromedia, Bithynia, Turkey | |