Anna Borkowska

Mother Bertranda, O.P. (; 1900–1988), later known as Anna Borkowska, was a Polish cloistered Dominican nun who served as the prioress of her monastery in Kolonia Wileńska near Wilno (now Pavilnys near Vilnius, Lithuania).

Acting on her own initiative, Mother Bertranda then took in 17 members of Hashomer Hatzair, a local Zionist group, and hid them within the grounds of her monastery. The activists included Abba Kovner, the movement's leader, Abraham Sutzkever, Arie Wilner and Edek Boraks. They helped the nuns with working their fields, while Kovner, realizing the goals of Hitler's Final Solution, worked on organizing a political resistance to the occupation and writing his manifesto for the later uprising. She maintained her religious devotion after being released from her monastic vows.