Robert de Clifford, 1st Baron de Clifford, English soldier and politician, Lord Warden of the Marches (b. 1274)
Robert de Clifford, 1st Baron de Clifford (1 April 1274 – 24 June 1314), of Appleby Castle, Westmorland, feudal baron of Appleby and feudal baron of Skipton in Yorkshire, was an English soldier who became 1st Lord Warden of the Marches, responsible for defending the English border with Scotland.