Simon I de MONTFORT
Simon I de was born about 1025 in Montfort Amaury, Ile -de-France, France.  He died in 1087.

 Isabel de BROYES
Isabel de was born about 1034 in Boyes, Marne, France.  She died before 1060.

 Isabel (Elizabeth) MONTFORT
Isabel (Elizabeth) was born about 1058 in Flamstead, England.