Hans Eysenck and the Jewish question: Genealogical investigations

We present evidence establishing that Hans Eysenck was half Jewish. He went out of his way to conceal this fact and to disavow his Jewish ancestry until the publication of his full-length autobiography in 1990, long after he retired, when he revealed that one of his grandparents was Jewish. Using specialized genealogical techniques and resources, we trace his Jewish maternal grandmother, who died in Theresienstadt concentration camp in 1944, and his Jewish maternal grandfather, who practised medicine in Königshütte and later in Berlin. We discuss Eysenck's possible motives for disavowing his Jewish heritage for most of his life.