Joannes Sturmius Mechlinianus, or Johannes Sturmius of Mechelen, was a prominent figure during the Humanist movement in the 16th century. Born around 1500 in Mechelen, which is in present-day Belgium, he was a scholar, educator, and a key advocate for the Humanist ideals of education and civic engagement.

Joel M. Moss is a physician known for his work in the field of medicine, particularly related to pulmonary diseases and critical care. He has been involved in research and clinical practice that addresses various aspects of respiratory health.

Johan de Witt (1625–1672) was a significant Dutch statesman and a prominent figure in the early history of the Netherlands during the 17th century, a period known as the Dutch Golden Age. He served as the Grand Pensionary of Holland, which made him one of the leading political figures in the Dutch Republic.

Johann Christoph Schmidt is not a widely known figure, but the name may refer to a variety of individuals, as it is a relatively common name in German-speaking countries. If you’re looking for information about a specific Johann Christoph Schmidt, it would be helpful to have more context, such as their profession, notable achievements, or the field in which they are associated (e.g., music, literature, science).

Johannes Franz Hartmann does not appear to be a widely recognized figure in public records, history, or popular culture up to my last knowledge update in October 2023. It's possible that he could be a private individual, a lesser-known person, or perhaps a fictional character from a specific work.

John C. Oxtoby is an American mathematician known for his contributions to the field of topology, particularly in general topology and its applications in various areas of mathematics. He has authored several influential texts on topology, including "Topology", which is a widely used textbook in the subject. His work has helped shape the understanding of fundamental concepts in topology and has influenced both teaching and research in that area.

John Perdew is a prominent physicist known for his contributions to the field of condensed matter physics, particularly in the area of density functional theory (DFT). He is a professor at Tulane University and has made significant advancements in the theoretical understanding of electronic structure and materials science. Perdew's work has helped to develop methods for predicting the properties of atoms, molecules, and solids with a computationally efficient approach.