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]
Frederick married Hildegarde von Swabia about 1045 in Germany. Hildegarde (daughter of Duke of Swabia II Otto) was born about 1024 in Swabia. [Group Sheet] [Family Chart]
Frederick married Adelheid von Filsgau about 1016 in Germany. Adelheid (daughter of Pfalzgraf of Swabia Frederick von Filsgau and Kunigunde von Oehringen) was born about 995; died about 1020. [Group Sheet] [Family Chart]
Frederick married Kunigunde von Oehringen. Kunigunde (daughter of Count of Ohningen Kuno and of Germany Richilde) was born about 980; died about 1005. [Group Sheet] [Family Chart]