John I, Duke of Brunswick-Grubenhagen (born: before 1322; died: 23 May 1367) was provost of the St. Alexandri Minster in Einbeck.
| John I, Duke of Brunswick-Grubenhagen | |
|---|---|
| Born | before 1322 |
| Died | 23 May 1367 |
| House | House of Guelph |
| Father | Henry I, Duke of Brunswick-Lüneburg |
| Mother | Agnes of Meissen |
He was the son of Duke Henry I "the Marvelous" of Brunswick-Grubenhagen and his wife Agnes of Meissen, daughter of Margrave Albert II of Meissen.
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