Walther I. v.Arnstein	Irmgard v.Plötzkau?		Adela (1) v.Meissen
Walther II. v.Arnstein		Gertrud v.Ballenstedt

Walther III. Graf v.Barby*v.8.6.1223, +v.26.3.1263

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Do you see errors?/Do you have hints?