During the German occupation Marianna Krasnodębska, like her parents and siblings, was active in the resistance movement. The Germans murdered her four brothers for helping the partisans. The Jarosz family helped the local Jews inside the ghetto in the locality of Piaski supplying them with food, medicines and documents. They hid over dozen Jews at their homestead, including Józef Honig with his father and brother. Marianna, her brothers Aleksander and Maksymilian, and her parents Anna and Ignacy were recognised as Righteous Among the Nations.