Ellenor Andrea Andreen (1888–1972) was a Swedish physician, pacifist and feminist. As a physician, she specialized in the treatment of diabetes, combining dietary restrictions with insulin. A prominent figure in the Swedish women's movement, she became a council member of the Women's International Democratic Federation in 1945, later becoming a vice-president. She chaired the Svenska Kvinnors Vänsterförbund (Swedish Women's Left-wing Association) from 1946 to 1964. A strong proponent of nuclear disarmament, in 1953 she was awarded the Stalin Peace Prize.[1][2]