> He was executed by the Gestapo, probably in October 1943.
Stanisław Saks (30 December 1897 – 23 November 1942) was a Polish mathematician and university tutor, a member of the Lwów School of Mathematics, known primarily for his membership in the Scottish Café circle, an extensive monograph on the theory of integrals, his works on measure theory and the Vitali–Hahn–Saks theorem.
> Arrested in November 1942, he was executed on 23 November 1942 by the German Gestapo in Warsaw.
Thankfully most of them seem to have survived the war. It's a shame that these days people are still into these murderous systems like communism and national socialism. We never learn.