Burger Sphere

"The term hamburger originally derives from Hamburg, Germany's second largest city, from which many people emigrated to the United States. In High German, Burg means fortified settlement or fortified refuge and is a widespread component of place names. Hamburger, in the German language, is the demonym of Hamburg. Similar to frankfurter and wiener, names for other meat-based foods, being demonyms of the cities of Frankfurt and Vienna (Wien), respectively.
The term "burger", a back-formation, is associated with many different types of sandwiches similar to a (ground meat) hamburger, using different meats, such as a buffalo burger, venison, kangaroo, turkey, elk, lamb, salmon burger or veggie burger."