Vortigern, also spelled Vortiger, Vortigan, Voertigern and Vortigen, was a 5th-century warlord in Britain, known perhaps as a king of the Britons or at least connoted as such in the writings of Bede and Gildas. His existence is contested by scholars and information about him is obscure.
Detail from Lambeth Palace Library MS 6 folio 43v illustrating an episode in Historia Regum Britanniae (c. 1136). Pictured above, Vortigern sits at the edge of a pool whence two dragons emerge, [a crimson dragon representing Uther Pendragon defeating the white dragon that represents Vortigern] which do battle in his presence.