Thomas I Sire De Coucy
Thomas I Sire was born about 1073 in Coucy, Ardennes, France.  He died about 1131.

 Ida De Hainault
Ida was born about 1085 in Hainault, Belgium.  Ida is no longer alive.

 Basilia (Beatrix) De Coucy
Basilia (Beatrix) was born about 1101.  She died after 1156.