Thurstan (Toussaint) Bastembourg de Montfort
Thurstan (Toussaint) Bastembourg de was born about 0942 in Bastembourg, Normandy, France.  He died about 1023 in Montfort-sur-Risle, Eure, Normandy, France.

 Adeline de Montfort
Adeline de was born about 0963 in Montfort-sur-Risle, Eure, Normandy, France.  Adeline de is no longer alive.

 Gisele de Montfort
Gisele de was born about 0970 in Montfort-sur-Risle, Eure, Normandy, France.  Gisele de is no longer alive.

 Hugh I de Montfort
Hugh I de was born in 0975 in Montfort-sur-Risle, Eure, Normandy, France.  He died about 1037 in Normandy, France.