Katharina was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Jan z Vartemberka. They were married, but the date and place have not been found. Their six known children were Kateřina (c1297-1355), Jan (?-<1368), Markvart (?-?), Václav (?-?), Anna (?-?) and Vaněk (?-1364).