She might be wife of Baldwin III instead of Mathilde de Saxony.
Father: Louis IV * DE FRANCE b: 10 SEP 920 in Laon, Aisne, France
Mother: Gerberga * VON SACHSEN b: 914 in Nordhausen, Sachsen
Marriage 1 Baudouin III * DE FLANDRES b: 933 in Flandres, France
Married: 961 in France
Children
Arnulf II * DE FLANDRES b: DEC 961 in Flandres, France
Jean * DE CONTEVILLE b: 962 in Conteville, Normandie, France
Marriage 2 Konrad I * DE BOURGOGNE b: ABT. 930 in Bourgogne, France
Married: 964
Children
Berthe * DE BOURGOGNE b: 964 in Bourgogne, France
Gerberga * DE BOURGOGNE b: 965 in Bourgogne, France
Matilda DE BOURGOGNE b: ABT. 966
Marriage 3 Godefroi * D'ARDENNES b: 932 in Verdun, Meuse, France
Married: ABT. 970
Married: ABT. 968
Children
Hermann * DE VERDUN b: 970
Berthe * DE FLANDRES b: ABT. 971 in Flandres, France
Ermentrude * DE VERDUN b: ABT. 972
Bonne * D'ARDENNES b: 974 in Ardennes, France
Gerberge * DE VERDUN b: ABT. 975
Godefroi * DE VERDUN b: ABT. 976
Gonzelon I * DE VERDUN b: ABT. 978 in Verdun, Meuse, France