Günther was the son of Günther XII von Schwarzburg-Blankenburg and Mechiltd von Käfernburg. The date and place of his birth have not been found.
He died in 1354. The place is not known.
His wife was Richza von Schlüsselburg, who he married in BEF 1326. The place has not been found. Their two known children were Johann II (1327-1407) and Günther XXVI (XIV) (?-1362).
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Günther IX von Schwarzburg-Blankenburg |
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Helene von Sachsen-Lauenburg |
Johann I von Sachsen-Lauenburg |
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Ingeborg Birgersdotter av Sverige |
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Mechiltd von Käfernburg |
Günther VI von Käfernburg-Ilmenau |
Günther V von Käfernburg |
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Sofie von Schlüsselberg |
Eberhard II von Schlüsselberg |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | 1354 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | FROM 1327 TO 1354 | graf von Schwarzburg-Wachsenburg |