Robrecht le Frison
Robrecht was born about 1033 in Flanders, Belgium.  He died on October 3rd, 1093.

 Gertrude Von Sachsen
Gertrude was born about 1028 in Schweinfurt, Unterfranken, Bavaria.  She died on August 4th, 1113.

 II Robert
II was born about 1053.

 Gertrude De Flanders
Gertrude was born about 1055 in Flanders, Belgium.  She died in 1117.