Stewart Baldwin, Todd A Farmerie & Peter Stewart, 'Hermann Billung, Duke of Sach...

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Stewart Baldwin, Todd A Farmerie & Peter Stewart, 'Hermann Billung, Duke of Sachsen (Saxony), d. 973' in The Henry Project: The Ancestors of King Henry II of England. Online American Society of Genealogists https://fasg.org/projects/henryproject : accessed 31 July 2025).

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