Simon III De Montfort Seigneur de Montfort-l'Amaury
| Birth* | Simon III De Montfort Seigneur de Montfort-l'Amaury was born circa 1170 at France. |
| Marriage* | He married Alix De Montmorency, daughter of Bouchard IV De Montmorency Seigneur and Laurence De Haynaut, before 1190 at France. |
| Death* | Simon III De Montfort Seigneur de Montfort-l'Amaury died on 25 June 1218 at Toulouse, Languedoc, Haute-Garonne, France; Killed at seige of Toulouse. |
| Occupation* | He was employed Seigneur de Montfort-l'Amaury, Earl of Leicester, Comte de Toulouse, Duc de Narbonne, commander of Albigensian Crusade. |
Family | Alix De Montmorency |
| Child |