What type of surety was the Earl of Pembroke who participated in the battle at Lincoln castle in 1217?
William Marshal, 2nd Earl of Pembroke William Marshal, 2nd Earl of Pembroke (French:"Guillaume") (1190 – 6 April 1231) was a medieval English nobleman and was one of Magna Carta sureties. He fought during the First Barons' War and was present at the Battle of Lincoln (1217).
Thomas de Beauchamp, 11th Earl of Warwick Thomas de Beauchamp, 11th Earl of Warwick, KG (c. 14 February 1313 – 13 November 1369) was an English nobleman and military commander during the Hundred Years' War. In 1348 he became one of the founders and the third Knight of the Order of the Garter.