István was the son of János Kapy de Kapivár and Erzsébet Soós de Sóvár. The date and place of his birth have not been found.
István Kapy de Kapivár
János Kapy de Kapivár
András Tétényi (-1416)
Miklós Kaproncai (-<1489)
Erzsébet Soós de Sóvár