Alfred Alexander (7 March 1880 – 15 May 1950) was a German physician who served as President of the Berlin Association of Doctors during the 1930s. He was a leading researcher into the cure for leukaemia. One of his patients was Sir Ivone Kirkpatrick. In 1935 he and his family fled Nazi Germany to England, where he established a medical practice, with a clinic in Harley Street. He died in 1950. As father to the war crimes investigator Hanns Alexander, Alfred Alexander is featured in Hanns and Rudolf, a dual biography by Thomas Harding (Grandson of his daughter Elsie).