The name “hamburger” originated from German immigrants and dates back to the late 1880’s. The word came from the name of the town Hamburg in Germany.
To make meats more tender German immigrants would grind up beefsteak and the steak was named “hamburg steak”. That was later shortened and changed to “hamburger”.
Most agree that the origin of the name was from the German immigrants but there is a dispute who actually created the first hamburger, that is a ground beef patty between two pieces of bread. The hamburger seems to have made its jump from plate to bun in the last decades of the 19th century.