Robert de Clifford, 1st Lord (Baron) Clifford, so created by writ of summons to Parliament 29 Dec 1299 according to later doctrine (which held that the title was heritable by heirs general, ie. including females and their issue, while descendants of the original grantee by females married into other families can also inherit); in 1291 inherited Brougham Castle and the Hereditary Shrievalty of Westmorland on the death of his mother; Justice in Eyre North of Trent 1297-1307/8, Governor Nottingham Castle July 1298, Capt. General of Marches of Scotland 1299, Marshal of England 1307, Justice South of Trent 1307-8, Waren Scottish Marches 1308. [Burke's Peerage]
------------------------------------------------
Robert de Clifford, son of Roger de Clifford by Isabel de Vipont, s. his grandfather, Roger de Clifford, and was summoned to parliament as a Baron from 29 December, 1299 (28th Edward I), to 26 November, 1313 (7th Edward II). This nobleman participated in the Scottish wars of King Edward I and ha d a principal command in the English army. He fell in the following reign at the battle of Bannockburn. His lordship m. Maud, dau. and co-heiress of Thomas, 2nd son of Richard de Clare, 7th Earl of Gloucester, and had issue, besides an elder son, Roger, Lord of Westmoreland, who d. s. p. 1327, a 2nd son, Robert de Clifford. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 122, Clifford, Earls of Cumberland and Barons Clifford]