With his first wife, Hans Eysenck had a son Michael Eysenck, who is also a psychology professor.
At the time of his death, Eysenck was the most frequently cited living psychologist in the peer-reviewed scientific journal literature.
An initial move to England in the 1930s became permanent because of his opposition to the Nazi party and its persecutions. "My hatred of Hitler and the Nazis, and all they stood for, was so overwhelming that no argument could counter it.".
He is best remembered for his work on intelligence and personality, although he worked on other issues in psychology.
He had four children with his second wife, Sybil Eysenck: Gary, Connie, Kevin, and Darrin. Hans and Sybil Eysenck collaborated as psychologists for many years at the Institute of Psychiatry, University of London, as co-authors and researchers.