Sigrid Undset was a Norwegian novelist who was awarded the Nobel Prize for Literature in 1928. Undset was born in Kalundborg, Denmark, but her family moved to Norway when she was two years old. In 1924, she converted to Roman Catholicism. She fled Norway for the United States in 1940 because of her opposition to Nazi Germany and the German invasion and occupation of Norway, but returned after World War II ended in 1945. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Venus they are named after deceased women who have made outstanding or fundamental contributions to their field (if over 20 km). If smaller common female first names are used.
Image Source. Marker locations are approximate and may not always appear to align with image on map.