Walther II. v.Arnstein	Gertrud v.Ballenstedt	Gebhard IV. v.Querfurt * v.Magdeburg	Liutgardis v.Nassau
Walther III. v.Barby		Lucard v.Magdeburg

Burchard II. Graf v.Barby*v.1240, +24.11.1271/8.12.(1271?)

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Do you see errors?/Do you have hints?