The Etruscan Sibyl was the priestess presiding over the Apollonian oracle.

The word Sibyl comes (via Latin) from the ancient Greek word sibylla, meaning prophetess. There were many Sibyls in the ancient world, but the Etruscan Sibyl predicted the Trojan War.

Whether the sibyl in question was the Tiburtine Sibyl of Tibur or the Greek Sibyl of Cumae is not always clear.