Children

 Thurston de Montfort
Thurston was born about 1134 in Montfort, Eure, Normandy, France.  He died about 1180 in Beaudefert Castle, Warwickshire, England.


 Bertrade de Montfort
Bertrade was born in 1138 in Montfort, Eure, Normandy, France.  She died at the age of 51 on July 12th, 1189.


 Simon IV de Montfort
Simon IV was born about 1150 in Montfort-sur-Risle, Eure, France.  He died on June 25th, 1218 in Toulouse, France.