| Sisillius II | |
|---|---|
| King of Britain | |
| Predecessor | Guithelin; Marcia (Regent) |
| Successor | Kinarius |
| Issue | |
| Father | Guithelin |
| Mother | Marcia |
Sisillius II (Welsh: Seisyllt map Kyhylyn) was a Legendary King of the Britons as recounted by Geoffrey of Monmouth.[1] He came to power in 373BC.[2]