An eponym is a word derived from the name of a person, often used to describe a product, concept, or place associated with that individual. For example, the term sandwich comes from John Montagu, the 4th Earl of Sandwich, who is said to have invented this popular food item. Eponyms can also refer to historical figures, such as Hippocrates, whose name is linked to the Hippocratic Oath in medicine. Eponyms are common in various fields, including science, literature, and geography. In science, the term Newtonian refers to concepts related to Sir Isaac Newton and his laws of motion. Eponyms help to honor individuals while also providing a convenient way to reference their contributions or inventions in everyday language.