Anna Borkowska (Mother Bertranda)

Mother Bertranda, O.P. (née Janina Siestrzewitowska; 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). She was a graduate of the University of Kraków who had entered the monastery after her studies.