William Marshal, 2nd Earl of Pembroke

William Marshal, 2nd Earl of Pembroke was a medieval English nobleman and one of the sureties of Magna Carta. He fought during the First Barons' War and was present at the Battle of Lincoln (1217) alongside his father William Marshal, 1st Earl of Pembroke, who led the English troops. He commissioned the first biography of a medieval knight to be written, called L'Histoire de Guillaume le Mareschal, in honour of his father.