Family/Spouse: Unknown. [Group Sheet] [Family Chart]
Hildegarde married Frederick von Büren about 1045 in Germany. Frederick (son of Pfalzgraf of Swabia Frederick von Büren and Adelheid von Filsgau) was born about 1020 in Germany. [Group Sheet] [Family Chart]
Frederick married Princess of Germany Agnes about 1089 in Hohenstauffen, Germany. Agnes (daughter of Holy Roman Emperor IV Heinrich and Bertha de Savoy) was born in 1072 in of Klosterneuburg, Austria; died on 24 Sep 1143; was buried in Klosterneuburg, Austria. [Group Sheet] [Family Chart]