Janina Hosiasson was born on 6 December 1899 in Warsaw, the daughter of the merchant Josef Hosiasson and his wife Sophia Feigenblat. By the late 1920s she was a respected philosopher of logic of the
Lwów–Warsaw school who actively participated in the second Polish Philosophical Congress held in Warsaw in September 1927 and (like her husband-to-be) delivered papers at the First Congress of Mathematicians from Slavic Countries held in Warsaw and
Poznań in September 1929. She was one of the speakers at the first Unity of Science Congress in Paris 1935. She is also known to have participated in the preliminary meeting for the same in Prague the previous year. She attended the second Unity of Science Congress held in Copenhagen in 1936 and had also (like
Alfred Tarski) been scheduled to present her research at the fifth Unity of Science Congress at
Harvard in September 1939. On 1 September, Germany invaded Poland. On 6 September 1939, with Warsaw under artillery fire, the couple fled the city on foot. As Janina would report in letters to
Otto Neurath and
G.E. Moore, their progress east was slow and the road repeatedly strafed by the
Luftwaffe. The couple became separated after Janina accepted a lift on a motorcycle to
Rivne. From there, she made her way to
Vilnius where she eventually learnt her husband had taken refuge in
Bialystok. Soviet forces entered Poland on 17 September and both cities would fall under Russian occupation within the same month. Janina later met her husband in Bialystok but, disagreeing about where best to survive, he chose to remain there whilst she returned to Vilnius (a city under Polish jurisdiction at the outbreak of war but which the occupying Soviets formally returned to a then notionally independent
Lithuania). On 22 June 22, 1941, Germany invaded (the Polish territories annexed by) the Soviet Union and within days, their troops had entered Bialystok and, soon after, Vilnius. At some point before July 1941 Adolf Lindenbaum moved to Vilnius, staying in a small satellite community in the east of the city
. At some point before the middle of August 1941, Adolf, along with his sister Stefanja, would be arrested and then, in nearby
Naujoji Vilnia, shot by German forces or their Lithuanian collaborators. Hosiasson was arrested soon after the Nazis took over Vilnius and, from October 1941, was held in
Lukiškės Prison. Maria Sznajder suggests she was likely shot on 29 March 1942. == Select works ==