Sebile, alternatively written as Sedile, Sebille, Sibilla, Sibyl, Sybilla, and other similar names, is a mythical medieval queen or princess who is frequently portrayed as a fairy or an enchantress in the Arthurian legend and Italian folklore. She appears in a variety of roles, from the most faithful and noble lady to a wicked seductress, often in relation with or substituting for the character of Morgan le Fay. Some tales feature her as a wife of either King Charlemagne or Prince Lancelot, and even as an ancestor of King Arthur.