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).
William Marshal, 1st Earl of Pembroke William Marshal, 1st Earl of Pembroke (1146 or 1147 – 14 May 1219), also called William the Marshal (Norman French: "Williame le Mareschal"), was an Anglo-Norman soldier and statesman. He served four English kings – Henry II, his sons the "Young King" Henry, Richard I, and John, and John's son Henry III.