I'm not sure if I'm right but I believe in a way the Chinese. They made gunpowder for fireworks and in a way they were the first guns.
The inventor of the Gatling gun was Richard Jordan Gatling. The machine gun- like weapon was named after the inventor. He invented it in 1862.
Hiram Maxim
Hiram Maxim
harrison lingle
Hiram Maxim
Jonathon Browning.
Sir Hiram Maxim.
no
Harrison Lingle
Rather doubtful, since the weapon was named for it's inventor, Richard J. Gatling- note the G at the end.
It was an American inventor, Dr. Richard J who also invented the gataling gun
Clarence Laine