His third son Prince Alexander Friedrich, who suffered from epilepsy, was sterilised by the Nazis on 27 September 1938, he died a year later.
His father, Hugo Iltis, was a teacher at the Brno Gymnasium, a botanist and geneticist, and a vocal opponent of Nazi eugenics.
In its early years, and during the Nazi era, it was strongly associated with theories of Nazi eugenics and racial hygiene advocated by its leading theorists Fritz Lenz, (first director)Eugen Fischer, and by its second director Otmar von Verschuer.
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