After his death, she again acted as regent, this time for her second son Otto III of Northeim.
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Their daughter Richenza of Northeim (d. 1142) married Lothar of Süpplingenburg, Duke of Saxony and future Holy Roman Emperor.
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Egbert II's sister, Gertrude of Brunswick, had a daughter with her second husband, Henry the Fat, Margrave of Frisia of Northeim.
She was the daughter of Henry the Fat of Northeim (d. 1101) and Gertrud of Brunswick of the Brunonen dynasty.