Greek legendary figure, an ecstatic woman who uttered (mostly gloomy) prophecies. Already an ancient figure by 500 BCE, she soon multiplied into at least ten manifestations: Persian, Libyan, Delphic, Cimmerian (in Italy), Erythrean, Samina, Cumean, Hellespontic (near Troy), Phrygian, and Tiburtine. Sometimes a Hebrew Sibyl is added as an eleventh.