When a word or name is derived from a proper noun, it is called an eponym. We’re all familiar with many of these words, like fuchsia, from the botanist Leonhard Fuchs. (Note that the term eponym can also refer to the person for whom something is named.) Sometimes the spelling of the modern form of the eponym has changed: Denim, for example, comes from the French de Nîmes, meaning “from Nîmes.” Often, the proper noun is part of a compound term. Medical nomenclature for diseases, syndromes, conditions, and anatomical parts, such as Down syndrome, Wernicke’s area, and Lou Gehrig’s disease, includes many such eponyms.