A castle mentioned by Chrétien de Troyes and his continuators as the home of Meliant and Bran. In the First Continuation of Perceval, the damsel of Lis, Guilorete, bears Gawain a son. Wolfram called its capital Barbigśl. It probably comes from the Welsh llys (“castle”), though other possibilities include the French lis (“lily”) and a corruption of iles (“isles”).