Cynfyn
| Cynfyn Conbinus | |
|---|---|
| King of Ergyng | |
| Reign | c. 585 – c. 615 |
| Predecessor | Peibio Clafrog |
| Successor | Gwrfoddw |
| Issue | Gwrgan Fawr |
| Father | Peibio Clafrog |
King Cynfyn (Latin: Conbinus; died c. 615) was the King of Ergyng, a kingdom of south-east Wales in the early medieval period. He was the son of Peibio Clafrog.