Isabel Martínez de Perón (born María Estela Martínez Cartas) F | Nazi Girls & other stuff

Isabel Martínez de Perón (born María Estela Martínez Cartas)
Former President of Argentina (1974-76)

Wikipedia:
Serving as Vice President to her husband and succeeding him upon his death, she was the first female president in the world, by virtue of succession (Vigdís Finnbogadóttir of Iceland being the first so elected in 1980) although women had served as republican heads of state (Soong Ching-ling having served as "chairman" of China).