Ablabius (Greek ), or Ablavius, was the name of several different people in the ancient world.
Ablabius Illustrius, mentioned in the Greek Anthology Ablabius (consul), praetorian prefect of the East of Constantine I, from 329 to 337/338 Ablabius (historian) ( 4th/5th century), writer of a history of the Goths based on Gothic legends, used by Cassiodorus and Jordanes Ablabius (assassin), a man who attempted to kill Justinian I in 562