Katarzyna Eugenia Skumin Tyszkiewicz (c. 1610âÂÂ1648) was a Polish noblewoman.
Katarzyna was the daughter of Janusz Skumin Tyszkiewicz and Barbara Naruszewicz. She was married to Jan Rakowski, Janusz Wià Âniowiecki (son of Konstanty Wià Âniowiecki) since 1627 and Aleksander Ludwik Radziwià Âà  since 1639.
Her marriage to Aleksander Ludwik Radziwià Âà Â, led to the conflict between Aleksander Ludwik Radziwà Âà  and Jeremi Wià Âniowiecki over the inheritance of Konstanty and Janusz. Eventually, in 1642, Katarzyna defected to Jeremi side and divorced Aleksander, who was forced to give up his claims .