LOL and don't know.

A hamburger is called a hamburger because the name originates from Hamburg, Germany, where a dish known as "Hamburg steak" was first created. This dish was a type of minced beef that was later adapted into the sandwich form we know today.
The term "hamburger" was derived from the city of Hamburg, not from the meat ham, which is a common misconception.
The name "hamburger" was initially used to describe a sandwich made with a patty of ground beef, and it has since become the standard term for this type of food, even though there is no ham involved.
The name has remained despite the evolution of the dish, and it is now widely recognized as a sandwich with a patty of ground meat, typically beef, placed inside a sliced bun or bread roll.