Vocation : Medical : Surgeon

Clarence Walton Lillehei (October 23, 1918 – July 5, 1999), was an American surgeon who pioneered open-heart surgery, as well as numerous techniques, equipment and prostheses for cardiothoracic surgery.

Sir Andrew Watt Kay (14 August 1914 – 1 February 2011) FRSE, FRCPSG, FRCSEd was a Scottish academic surgeon who was Regius Professor of Surgery at the University of Glasgow from 1964 to 1981. He developed the augmented histamine test, which bore his name, and was widely used in the investigation and treatment of peptic ulcer disease. He was knighted for services to surgery. From 1972 to 1974 he served as president of the Royal College of Physicians and Surgeons of Glasgow.

Charles Beck or Karl Beck (August 19, 1798 – March 19, 1866) was a German-born American classical scholar, Harvard professor and friend of Charles Follen.

August Karl Gustav Bier (24 November 1861 – 12 March 1949) was a German surgeon. He was the first to perform spinal anesthesia and intravenous regional anesthesia.

Célestin Sieur (La Chapelle-en-Lafaye, 27 December 1860 – Paris, 12 June 1955) was a French physician specializing in ENT surgery. The Sieur's sign is named after him.