Katalin was the daughter of János Sulyok de Lekcse but her mother is unknown. The date and place of her birth have not been found.
Her husband was András Kapy de Kapivár. They were married, but the date and place have not been found. Their five known children were András (?-?), Sándor (?-?), György (?-?), Anna (?-?) and Miklós (?-?).
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