Vocation : Medical : Physician

Sir Ewan Forbes, 11th Baronet, (6 September 1912 – 12 September 1991), was a Scottish nobleman, general practitioner and farmer. Forbes was a trans man; he was christened Elizabeth Forbes-Sempill and officially registered as the youngest daughter of John, Lord Sempill. After an uncomfortable upbringing, he began presenting as a man in the 1930s, following a course of medical treatments in Germany. He formally re-registered his birth as male in 1952, changing his name to Ewan, and was married a month later.
In 1965, he stood to inherit the baronetcy of his elder brother William, Lord Sempill, together with a large estate. This inheritance was challenged by his cousin, who argued that the re-registration was invalid; under this interpretation, Forbes would legally be considered a woman, and thus unable to inherit the baronetcy. The legal position was unclear, and it took three years before a ruling by the Court of Session, which held him to be intersex, finally led to the Home Secretary recognising his claim to the title. The case was heard in great secrecy, with the effect that it was unable to be considered in other judgments on the legal recognition of gender variance, but has become more widely known since his death in 1991.

Jean-François Mattei (born 14 January 1943) is a French doctor and politician.

George Hill Hodel Jr. (October 10, 1907 – May 17, 1999) was an American physician and suspect in the murder of Elizabeth Short, the Black Dahlia. He was never formally charged with the crime, but is believed by many to have been the murderer, including by two of his children. He was also accused of raping his daughter, Tamar Hodel, but was acquitted of that crime. He lived overseas several times, primarily between 1950 and 1990 in the Philippines.

Isala Van Diest (7 May 1842 – 9 February 1916) was the first female medical doctor and the first female university graduate in Belgium.

Friedrich Wolf (23 December 1888 – 5 October 1953) was a German doctor and politically-engaged writer. From 1949 to 1951, he served as East Germany's first ambassador to Poland.

Alexandre Emile Jean Yersin (22 September 1863 – 1 March 1943) was a Swiss-French physician and bacteriologist. He is remembered as the co-discoverer of the bacillus responsible for the bubonic plague or pest, which was later named in his honour: Yersinia pestis. Another bacteriologist, the Japanese physician Kitasato Shibasaburō, is often credited with independently identifying the bacterium a few days earlier. Yersin also demonstrated for the first time that the same bacillus was present in the rodent as well as in the human disease, thus underlining the possible means of transmission.