[citation needed] He was the son of Simon III de Montfort, Count of Évreux and Lord of Montfort-l'Amaury.
On his death, Simon III left the comté of Évreux to his elder son Amaury V, and his French properties in Montfort-l'Amaury and Rochefort-en-Yvelines to Simon.
[1]: 340 Montfort married Amicia, daughter of Robert de Beaumont, 3rd Earl of Leicester.
The discrepancy in numbering arises from confusion between Simon III de Montfort (died 1181) and his son (the subject of this article, died 1188).
This biography of a French peer or noble is a stub.