frédéric married Duchess Mathilde von Egisheim, von Schwaben in 1012. Mathilde (daughter of Herman II, Duke of Swabia and Princess Gerberga de Burgundy, of Upper Burgundy, daughter of Hermann II von Werl and Gerberge de Bourgogne Transjurane, daughter of King Conrad I "The Peaceful", of Burgundy and Matilda Capet (Princess) of FRANCE aka Mathilda of BURGUNDY, daughter of Gerberge de Bourgogne Transjurane) was born about 989 in Arnsberg, North Rhine-Westphalia, Germany; died on 29 Jul 1031 in Ballenstedt, Quedlinburg, Saxony, Prussia, Germany; was buried in Worms, Rhineland-Palatinate, Germany. [Group Sheet] [Family Chart]