Person

Eric I, Duke of Brunswick-Grubenhagen

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Eric I, Duke of Brunswick-Grubenhagen nicknamed the winner, ruled the Principality of Grubenhagen, a part of the Duchy of Brunswick-Lüneburg.

From Wikipedia (CC BY-SA 4.0).

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Eric I, Duke of Brunswick-Grubenhagen nicknamed the winner, ruled the Principality of Grubenhagen, a part of the Duchy of Brunswick-Lüneburg.

From Wikipedia (CC BY-SA 4.0).