- Montfort, Simon de. Earl of Leicester. 1208?-1265. French-born English nobleman who led the baronial opposition to Henry III. After their armed forces success over the master at Lewes in southeast The united kingdomt (1264), Montfort had been the efficient ruler of The united kingdomt. In 1265 he labeled as a representative legislature seen as The united kingdomt's first full parliament.
- an English nobleman who led the baronial rebellion against Henry III (1208-1265)