Gilbert Middleton
Gilbert Middleton (died 1318) was an English knight with lands in Northumberland who rebelled and was executed for treason. Gilbert was a son of Gilbert of Middleton and grandson of the Lord Chancellor Richard of Middleton. His father was dead by 1291, when he was still a minor. He was placed under the wardship of the royal squire William Felton. In 1300, he attained his majority and took part in the English invasion of Scotland. By 1313, Gilbert was a knight of the royal household in the garrison at Berwick Castle. In 1315, he was posted to Alnwick Castle. He was still in the royal service in early 1317, when he received wages for himself and his retinue. On 1 September 1317, however, he attacked a party that included the bishop-elect of Durham, Louis de Beaumont; his brother, Henry de Beaumont; and two cardinals, Gaucelin de Jean and Luca Fieschi. He imprisoned the Beaumonts in Mitford Castle, but let the cardinals go. Gilbert was joined in rebellion by fellow household knights John de Lilburne, Walter Selby and Goscelin d'Eyville. On 17 October, Louis de Beaumont was also freed. The rebels extorted 500 marks from the bishopric of Durham for an