Kateřina was the daughter of Aleš ze Sovince but her mother is unknown. The date and place of her birth have not been found.
Her husband was Oldřich Černohorský z Boskovic. They were married, but the date and place have not been found. Their nine known children were Apolonie (?-?), Johanka (?-?), Bohuslav (?-?), Václav (1480-1554), Jaroslav (?-?), Arkleb (?-1528), Jetřich (?-c1549), Vaněk (?-c1507) and Anna (?-c1527).