Simon de Montfort (died 1188), sometimes known as Simon IV[A] de Montfort, was lord of Montfort-l'Amaury from 1181 to 1188. 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.:340
- Simon de Montfort, 5th Earl of Leicester
- Guy de Montfort, Lord of Sidon
- Petronilla (Pernel) de Montfort, wife of Barthélemy de Roye
A His son the 5th Earl is also sometimes known as Simon IV. The discrepancy in numbering arises from confusion between Simon III de Montfort (died 1181) and his son (the subject of this article, died 1188). The latter was historically unknown, and Simon III was believed to be the father (not the grandfather) of the 5th Earl, who is therefore known as Simon IV in some sources and Simon V in others.
- Pierre Bauduin (2004). La Première Normandie (xe-xie siècles) (in French). Caen: Presses Universitaires de Caen. ISBN 2841331458.
- Cokayne, G. E. (1929). The Complete Peerage. 7 (2nd ed.). London: St Catherine Press. p. 717.
- Cokayne, G. E. (1929). The Complete Peerage. 7 (2nd ed.). London: St Catherine Press. p. 716.
- Phillips, Charles. "Battle of Toulouse". Encyclopædia Britannica Online. Retrieved 5 June 2019.
- Lippiatt, G. E. M. (2017). Simon V of Montfort and Baronial Government, 1195-1218. Oxford University Press. ISBN 9780198805137.
| Seigneur de Montfort
Simon de Montfort, 5th Earl of Leicester