Katalin was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Péter Forgách de Ghymes et Gács. They were married, but the date and place have not been found. Their seven known children were Ferenc (?-1531), Fruzsina (?-?), Zsófia (?-?), György (?-?), László (?-1550), Sebestyén (?-1526) and Zsuzsanna (?-?).