Tsvetaeva, Marina, 1892-1941.

Marina Tsvetaeva [Марина Ивановна Цветаева] (1892-1941) was a major Russian poet. In 1922 she left Russia with her daughter Ariadna Efron [Ариадна Сергеевна Эфрон] and son Georgii (Moor) Efron [Георгий Сергеевич (Мур) Эфрон] to join her husband, a White Army officer Sergei Efron [Сергей Яковлевич Эфрон] in Berlin. In 1937 Tsvetaeva's daughter and husband who had developed Soviet sympathies returned to the Soviet Union. In 1939 Tsvetaeva and her son followed them. In 1941 her husband was executed and her daughter sentenced to eight years of labor camps. The same year Tsvetaeva and her son were evacuated from Moscow to the city of Yelabuga where she committed suicide on August 31. Her son Georgii enlisted in the Soviet Army and was killed in the war.

Boris Ottokar Unbegaun [Борис Генрихович Унбегаун] (1898-1973) was a Russian linguist. Born in Moscow into a German family, he left Russia after the October Revolution, and studied in Slovenia and at the Sorbonne. After the German occupation of France, he was sent to Buchenwald concentration camp where he remained until the end of World War II. Later, he was a professor at the University of Strasbourg, in Brussels, and at the University of Oxford. In 1965 he became professor of Slavic linguistics at New York University in the United States, where he died in 1973.

Boris Unbegaun met Marina Tsvetaeva in 1935 and the two families became friends. They continued their friendship until Tsvetaeva left France in 1939.