Siegfried of Luxemburg

 Hedwig von Nordgau
Hedwig was born before 0950.

 Eva of Luxemburg
Eva of was born before 0960.

 Frederick I of Luxemburg
Frederick I of was born about 0965.  He died on October 6th, 1019.

 Luitgarde de Cleves of Luxemburg
Luitgarde de Cleves of was born before 0970.  She died on May 14th, 1005.

 Henry I of Luxemburg
Henry I of was born before 0980.

 Judith de Luxemburg
Judith was born before 0998.

 Cunigunda (St.) of Luxemburg
Cunigunda (St.) of was born before 0998.