Cecilie was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Bohuslav V (IV) ze Švamberka. They were married, but the date and place have not been found. Their four known children were Jan II (?-c1414), Bohuslav VI (?-1425), Eliška (?-c1403) and Anna (?-?).