István was the son of Menyhért Balassa de Gyarmat and Anna Thurzó de Bethlenfalva. The date and place of his birth have not been found.
He died about 1584. The place is not known.
His wife was Ilona Zrínyi de Brebir, who he married on 7 FEB 1569 in Topolcany. They had no known children.
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István Balassa de Gyarmat |
Menyhért Balassa de Gyarmat |
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János VI Thurzó de Bethlenfalva |
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Anna Abaffy de Nagyabafalva |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | ABT 1584 |
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