Notable : Famous : Founder/ originator

Henri Édouard Tresca (12 October 1814 – 21 June 1885) was a French mechanical engineer, and a professor at the Conservatoire National des Arts et Métiers in Paris.

Paul Trendelenburg (24 March 1884, Bonn – 4 February 1931, Berlin) was a German pharmacologist.
He studied medicine at the universities of Grenoble, Leipzig and Freiburg, where from 1909 to 1918, he worked as an assistant in the pharmacological institute and at the surgical clinic. In 1912 he received his habilitation in pharmacology and toxicology, and from 1916 was an associate professor. In 1919 he became a full professor at the University of Rostock and later on, he served as a professor of pharmacology at the universities of Freiburg (from 1923) and Berlin (from 1927).He is known for his research of adrenaline, for the development of biological measurement procedures for the standardization of hormone preparations and for his investigations regarding the role of the hypothalamic hormones vasopressin and oxytocin. His name is associated with the so-called "Trendelenburg preparation", a preparation used in determining the actions of pharmacological agents on peristalsis.He was the son of surgeon Friedrich Trendelenburg and the brother of physiologist Wilhelm Trendelenburg. His son, Ullrich Georg Trendelenburg, was also a pharmacologist.

Joseph Marie de Tilly (16 August 1837 – 4 August 1906) was a Belgian military man and mathematician.
He was born in Ypres, Belgium. In 1858, he became a teacher in mathematics at the regimental school. He began with studying geometry, particularly Euclid's fifth postulate and non-Euclidean geometry. He found similar results as Lobachevsky in 1860, but the Russian mathematician was already dead at that time. Tilly is more known for his work on non-Euclidean mechanics, as he was the one who invented it. He worked thus alone on this topic until a French mathematician, Jules Hoüel, showed interest in that field. Tilly also wrote on military science and history of mathematics. He died in München, Germany.

André Strohl (20 March 1887 – 10 March 1977) was a French physiologist who was a native of Poitiers. He is remembered for his role in the diagnosis of Guillain–Barré syndrome (sometimes called Guillain–Barré–Strohl syndrome), a form of areflexic paralysis which exhibits normal cell count but with an abnormal increase in spinal fluid protein. The syndrome is named after two French neurologists; Georges Guillain and Jean Alexandre Barré.
In 1916, during World War I, Strohl was serving in the Neurological Centre of the French Sixth Army with Guillain and Barré. The three doctors noticed that two soldiers, who were suffering from muscular weakening and pain along with paresthesias, had an unexpected amount of spinal fluid protein production. Strohl is credited with performing the electrophysiological tests on the soldiers. Eventually, the two patients were able to recover from their illness. In 1916, Guillain, Barré and Strohl reported their findings in a medical journal. In 1927, H. Draganesco and J. Claudion coined the term "Guillain–Barré syndrome", apparently overlooking Strohl's contributions.In 1924 Strohl became a professor of physiological medicine in Algiers, and two years later acquired the same position at the University of Paris. He retired from there in 1957. He was also a member of the Académie Nationale de Médecine.

Gino Strada (21 April 1948 – 13 August 2021) was an Italian war surgeon, human rights activist, peace activist, and founder of Emergency, a recognized international non-governmental organization.

Hugo Spatz (2 September 1888 – 27 January 1969) was a German neuropathologist. In 1937, he was appointed director of the Kaiser Wilhelm Institute for Brain Research. He was a member of the Nazi Party, and admitted to knowingly performing much of his controversial research on the brains of executed prisoners. Along with Julius Hallervorden, he is credited with the discovery of Hallervorden-Spatz syndrome (now referred to as Pantothenate kinase-associated neurodegeneration). Hugo Spatz's Oberarzt (senior resident or attending physician), 1937–1939, Richard Lindenberg, became chief neuropathologist of the State of Maryland.

Alexandre-Achille Cyprien Souques (6 February 1860 – 24 December 1944) was a French neurologist born in Comprégnac in the département Aveyron.
Souques studied medicine in Paris, where in 1886 he became an interne and in 1891 earned his medical doctorate. Afterwards he worked as médecin des hôpitaux (Hospice de la Salpêtrière), and in 1918 became a member of the Académie de Médecine. With Joseph Babinski (1857-1932) and others, he was a founding member of the Societé de Neurologie de Paris.
He is remembered for his extensive research of Parkinsonism, and in a 1921 treatise titled Rapport sur les syndromes parkinsoniens, he documented the importance of encephalitis lethargica as a cause of Parkinsonism. With his mentor Jean-Martin Charcot (1825-1893), he described the eponymous "Souques-Charcot geroderma", a condition that is a variant of Hutchinson–Gilford disease. Souques is also credited with introducing the term "camptocormia" to describe an abnormal forward-flexed posture.

Eduard Sonnenburg (3 November 1848, in Bremen – 25 May 1915, in Bad Wildungen) was a German surgeon. He was a son-in-law to neurologist Karl Friedrich Otto Westphal.
After receiving his medical doctorate in 1872, he spent several years as an assistant to Georg Albert Lücke at the surgical clinic in Strassburg. In 1876 he qualified as a lecturer of surgery at the university. In 1880 he relocated to Berlin, where he worked under Bernhard von Langenbeck and Ernst von Bergmann.In 1883 he became an associate professor at the University of Berlin, and in 1890 was appointed director of the surgical department at the Krankenhaus Moabit. In 1913 he became an honorary full professor at the university.In 1886, he was a founding member of the Freie Vereinigung der Chirurgen Berlins (Free Association of Berlin Surgeons), an organization known today as the Berliner Chirurgische Gesellschaft. His name is associated with "Sonnenberg's sign", an indicator defined as bloody leukocytosis seen in appendicitis with localized peritonitis. He standardized Appendectomy, i.e. the surgery removing the vermiform appendix and was invited to perform the surgery for many nobles and royalties in Europe.