Johanna was the daughter of Johan II van Gemen and Oda van Horne. The date and place of her birth have not been found.
Her husband was Johann I von Nassau-Beilstein, who she married on 31 OCT 1447. The place has not been found. Their only known child was Heinrich IV (1449-1499).
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Johan II van Gemen |
Henrik III van Gemen |
Johan van Gemen |
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Beatrix Sobbe |
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Elisabeth van Bronckhorst |
Willem IV van Bronckhorst |
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Kunigunde von Mörs |
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Oda van Horne |
Willem VII van Horne |
Willem VI van Horne |
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Isabella Mechtild van Arkel |
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Johanna van Loon-Heinsberg |
Godfried II van Loon-Heinsberg |
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Filippa van Gulik |
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