Fritz Kahn in 2010 at the at the Charité. Notes and drafts for Kahn's unfinished book "The Natural History of Palestine" are preserved in the Arthur and Fritz Kahn Collection at the Leo Baeck Institute, Center for Jewish History in New York. Fritz Kahn Fritz Kahn (29 September 1888 – 14 January 1968) was a German Jewish physician who published popular science books and is known for his illustrations, which pioneered infographics. Fritz Kahn was born in Halle an der Saale, Germany, the son of Arthur Kahn, a physician and author, and Hedwig Kahn, "née" Schmuhl. His father emigrated to the USA
Leo Kahn (entrepreneur) become a professor at Boston University. Kahn married his first wife, Dorothy Davids, in 1963 and had three children. The family resided in Chelmsford, Massachusetts, until Dorothy Kahn's death in 1975. Leo Kahn continued to operate his family's wholesale food distributor. However, he also launched a new grocery retailing division, which became known as Purity Supreme. The company initially opened small groceries, but then expanded to supermarkets. The Purity Supreme company also included the Heartland Foods Warehouse, which was called "the first successful deep-discount warehouse supermarket in the country" by Inc Magazine. One Kahn's biggest rivals was Thomas G. Stemberg,