Bogusław Radziwiłł [SEP] father
Radziwiłł family and the Polish–Lithuanian Commonwealth had begun to drift apart, as Radziwłł were less satisfied with the magnate status of the family and its immense wealth and began craving more political power. 
Together with his cousin Janusz Radziwiłł in 1654 during The Deluge, or Swedish invasion of Poland, Bogusław Radziwiłł began negotiations with King Charles X Gustav of Sweden aimed at breaking the Commonwealth and the Polish–Lithuanian union. They signed a treaty according to which the Swedish–Lithuanian union was founded and the Radziwiłłs were to rule over
father Prince Bogusław Radziwiłł. Her mother was an heiress in her own right and brought much wealth including the duchies of Kėdainiai and Biržai. Ludwika Karolina Radziwiłł's death in Brieg in 1695 marks the end of the Biržai-Dubingiai Radziwiłł family line. She was the last Radziwiłł to own Biržai Castle and Dubingiai Castle with their lands.
Her father, Prince Bogusław Radziwiłł was the son of Janusz Radziwill (1579–1620) and Elisabeth Sophie of Brandenburg, and along with his cousin (and future father-in-law) Janusz