Rosa Luxemburg (Polish: Róża Luksemburg, [ˈruʐa ˈluksɛmburk] ; German: [ˈʁoːza ˈlʊksm̩bʊʁk] ; born Rozalia Luksenburg; 5 March 1871 – 15 January 1919) was a Polish and naturalised-German revolutionary socialist, orthodox Marxist, and anti-War activist during the First World War. She became a key figure of the revolutionary socialist movements of Poland and Germany during the late 19th and early 20th century, particularly the Spartacist uprising. Born and raised in a secular Jewish family in Congress Poland, she became a German citizen in 1897.
https://en.wikipedia.org/wiki/Rosa_Luxemburg