Rosa Luxemburg (also Rozalia Luxenburg; Polish: Róża Luksemburg; 5 March 1871 – 15 January 1919) was a Marxist theorist, philosopher, economist and revolutionary socialist of Polish Jewish descent who became a naturalized German citizen. She was successively a member of the Social Democracy of the Kingdom of Poland and Lithuania (SDKPiL), the Social Democratic Party of Germany (SPD), the Independent Social Democratic Party (USPD), and the Communist Party of Germany (KPD).
Marguerite Gardiner, Countess of Blessington (1789–1849) was an Irish novelist. Her childhood was unhappy due to her father's character and poverty, and her early womanhood wretched by her compulsory marriage at the age of 15 an English officer whose drunken habits finally brought his death in prison. Though of rare beauty, charm and wit, she had extravagant tastes shared with her husband, resulting in immense debt.