Robert IV "Le Frison" OF FLANDERS & Princess/ Gertrud Billunger OF SAXONY 
Robert IV "Le Frison" and Gertrud Billunger were married in a religious ceremony in 1063. They had a daughter named Gertrude.
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Personal Details
Robert IV "Le Frison" OF FLANDERS
Robert IV "Le Frison" was born in 1035 in Flanders, Belguim. He died at the age of 58 in 1093 in Kassel, Germany.
Princess/ Gertrud Billunger OF SAXONY
Gertrud Billunger was born in 1028. She died at the age of 85 in 1113 in Flanders, Belguim.
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