Original: Virgil 's biographical tradition is thought to depend on a lost biography by Varius , Virgil 's editor , which was incorporated into the biography by Suetonius and the commentaries of Servius and Donatus , the two great commentators on Virgil 's poetry .
Simplified: Scholars looking at the way he used words think that he may have Etruscan , Umbrian or even a Celtic background .