The origin of the tribal name is uncertain. It is not even clear whether it was an exonym (a name ascribed to them by outsiders) or an endonym (a name by which the Bastarnae described themselves). A related question is whether the groups denoted "Bastarnae" by the Romans considered themselves a distinct ethnic group at all (endonym) or whether it was a generic exonym used by the Greco-Romans to denote a disparate group of tribes of the Carpathian region that could not be classified as Dacians or Sarmatians.