Definition of the word duke

The word "duke" originates from the Old High German title "duhom" or "duchom," which was derived from the Proto-Germanic term "*thudiz," meaning "leader" or "warlord." The title was initially used by the rulers of Swabia, a region in southwestern Germany, and later spread to other parts of Europe. In the Middle Ages, the title "duke" was granted to noble rulers who were vassals of kings and queens. Over time, the term evolved to refer to a high-ranking nobleman who ruled over a duchy, a region or territory. Today, the title "duke" is still used in some European monarchies, such as the United Kingdom, where it is a high-ranking royal title.