János was the son of György Kapy de Kapivár and Klára Barczay. The date and place of his birth have not been found.
He had two marriages/partners. His first wife was Zsófia Kükemezey. They were married, but the date and place have not been found. They had no known children.
His second wife was Anna Parlaghy. They were married, but the date and place have not been found. They had no known children.
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