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).
Stephen Longchamp Stephen Longchamp (died 1214) was an Anglo-Norman knight of the 12th and 13th centuries. His brother was William Longchamp, who was justiciar of England.