The evolution of the sausage began in Babylon.
Modern incarnations of the food item include the Viennese wiener and the frankfurter, which was shaped in the form of a Frankfurt German butcher’s pet dachshund.
The Dachshund Sausage Dog became very popular in America, where the bun was added in 1904.
In 1906, cartoonist Ted Dorgan couldn’t spell dachshund, so he simply named his drawing of a dog on a bun covered in mustard a hot dog, and it’s been called that ever since.
That’s why a wiener on a bun called a “hot dog”.