Eysenck
Eysenck is a surname. Notable people with the surname include:

Hans Eysenck (1916–1997), German-born British psychology professor
Eysenck Personality Questionnaire, psychological test developed by Hans Eysenck
Michael Eysenck (born 1944), British psychology professor, son of Hans
Sybil B. G. Eysenck (1927–2020), Austrian-born British psychologist, wife of Hans