Sir Arthur William Mickle Ellis (4 May 1883 – 20 May 1966) was a British-Canadian physician, pathologist, and Regius Professor of Medicine at the University of Oxford (1943-1948).
He made significant contributions to clinical research as a professor of medicine at the London Hospital, specifically in the field of kidney illnesses known as nephritis.
He also worked on the Royal Commission on Population and was a founding member of the Birth Control Investigation Committee, which eventually became part of the Family Planning Association.
With the war ongoing, Ellis was appointed by King George VI as Regius Professor of Medicine at the University of Oxford in 1943, due to his reputation and breadth of experience in the fields of medical practice, research and administration.
In 1951, he was awarded the Moxon Medal of the Royal College of Physicians of London in recognition of his distinguished contribution to the knowledge of diseases of the kidney.