Siegfried III, Count of Boyneburg Est 1053 - Abt 1107 (1050–1107) Parents Otto of Nordheim Richenza of Swabia Children Richenza von Boyneburg Heinrich von Corvey Judith von Northeim Siegfried IV, Count of Northeim-Boyneburg and Homburg Siblings Henry, Margrave of Frisia Kuno, Count of Beichlingen Ethelinde of Northeim Mathilde von Northeim Ida von Nordheim Oda von Werl Partners Adelheid von Holstein