Robert ("de Fries") I of Flanders
Robert, known as "de Fries", was born about 1033 in Flandres, Belgium.  He died on October 3rd, 1093 in Kassel, Germany.

 Princess Gertrude of Saxony
Gertrude was born about 1028 in Schweinfurt, Unterfranken, Bavaria.  She died on August 4th, 1113.

 Gertrude of Flanders
Gertrude was born about 1064 in Flanders, Belgium.  She died in 1117.