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 and Marxist theorist. She was a key figure of the socialist movements in Poland and Germany in the early 20th century. Born to a Jewish family in Congress Poland, then part of the Russian Empire, Luxemburg became involved in radical politics at an early age via the Proletariat party, and fled to Switzerland in 1889.
https://en.wikipedia.org/wiki/Rosa_Luxemburg