Simon IV de Montfort
Simon IV de Montfort (c. 1175–1218) was lord of Montfort-l'Amaury from 1188 and, through his mother, Earl of Leicester in England. He joined the Fourth Crusade in 1199 but refused to share in the sack of Zara and left rather than march on Constantinople.
After the siege of Carcassonne in 1209, he was elected leader of the Albigensian Crusade in Languedoc. In 1210 he burned 140 Cathars at Minerve, and in 1213 he routed Peter II of Aragon at Muret.
He received the county of Toulouse in 1215 and was killed in June 1218 at the siege of Toulouse, struck in the head by a stone from a mangonel.