Simon de Montfort the Younger

Simon VI de Montfort, born in April 1240 and died in 1271, was the second son of Simon de Montfort, 6th Earl of Leicester, and Eleanor of England. His father and elder brother Henry lost their lives at the Battle of Evesham in August 1265. When Simon the Younger was bringing forces from London, he witnessed the capture of his banners by Prince Edward, which were then used to deceive his father. He arrived at the battle scene to find his father beheaded.

In 1266, Simon was besieged in Kenilworth Castle, which his father previously owned. Initially agreeing to surrender, he reneged, leading to a six-month siege by King Henry III. The castle was surrendered on 14 December. Simon and his brother Guy later fled to France and Italy, where they murdered their cousin Henry of Almain in 1271. Simon died the same year from Toscana virus in Siena, excommunicated and disgraced.