Dietrich, Count of Plötzkau son of Bernhard I von Kakelingen, Count of Harzgau and his wife Ida of Querfurt (b. 1050) Parents Bernhard I von Kakelingen Children Adelheid von Plötzkau Ermengarde von Plötzkau Helperich von Plötzkau, Margrave of the Nordmark Siblings Gebhard of Supplinburg Partners Mathilde von Walbeck