| Gratianus | |
|---|---|
| Born | Cibalae, Pannonia Secunda |
| Died | before 24 August 367 |
| Issue | Valentinian I Valens |
| Dynasty | Valentinianic |
Gratianus "Funarius" (fl. 4th century AD) was an Illyrian soldier of the Roman Empire who flourished in the 4th century. He was the father of Roman emperors, Valentinian I and Valens, founders of the Valentinianic dynasty.