Died aged c. 74
Felix Hausdorff (/ˈhaʊsdɔːrf/ HOWS-dorf, /ˈhaʊzdɔːrf/ HOWZ-dorf; November 8, 1868 – January 26, 1942) was a German mathematician who is considered to be one of the founders of modern topology and who contributed significantly to set theory, descriptive set theory, measure theory, and functional analysis. Life became difficult for Hausdorff and his family after Kristallnacht in 1938. The next year he initiated efforts to emigrate to the United States, but was unable to make arrangements to receive a research fellowship. On 26 January 1942, Felix Hausdorff, along with his wife and his sister-in-law, died by suicide by taking an overdose of veronal, rather than comply with German orders to move to the Endenich camp, and there suffer the likely implications, about which he held no illusions.DbPedia
Commemorated on 1 plaque
An dieser Universität wirkte 1921 - 1935 der Mathematiker Felix Hausdorff 8.11.1868 - 26.1.1942 Er wurde von den Nationalsozialisten in den Tod getrieben, weil er Jude war. Mit ihm ehren wir alle Opfer der Tyrannei. Nie wieder Gewaltherrschaft und Krieg!
Institute for mathematics, University of Bonn, Wegelerstraße 10, Bonn, Germany where they worked