William de Brus, 3rd Lord of Annandale

William de Brus, third Lord of Annandale (died 1212), succeeded his father Robert in 1194 after his elder brother predeceased him. He held large estates across northern England, where King John granted him a weekly market at Hartlepool.

He witnessed a charter of William the Lion of Scotland. By his wife Christina mac Uhtred he left three sons and was succeeded by the eldest, Robert, whose marriage to Isobel of Huntingdon later gave the Bruces their claim to the Scottish throne.